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A recursive island or lake is an island or a lake that lies within a lake or an island.[1] For the purposes of defining recursion, small continental land masses such as Madagascar and New Zealand count as islands, while large continental land masses do not. Islands found within lakes in these countries are often recursive islands because the lake itself is located on an island.


Recursive islands



Islands in lakes


Idjwi, in the central-southern region of Lake Kivu
Idjwi, in the central-southern region of Lake Kivu

Only a few notable examples are given.

Island In lake Country Area
(km2)
Coordinates Notes
Manitoulin Island Lake Michigan–Huron Canada 2,766 45°39′8″N 82°06′32″W Largest lake island in the world[1][2]
René-Levasseur Island Manicouagan Reservoir Canada 2,020 51°23′50″N 68°41′30″W The island is artificial as the lake it is in was made by flooding a smaller existing lake due to the creation of the Daniel-Johnson dam.[3]
Sääminginsalo Saimaa Finland 1,090 61°58′58″N 29°4′53″E If Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal).
Olkhon Island Lake Baikal Russia 730 53°9′24″N 107°23′1″E
Isle Royale Lake Superior United States 535 48°0′0″N 88°55′0″W
Ukerewe Island Lake Victoria Tanzania 530 2°1′46″S 33°0′36″E
St. Joseph Island Lake Michigan–Huron Canada 365 46°13′11″N 83°56′47″W
Drummond Island Lake Michigan–Huron United States 347 46°0′0″N 83°40′0″W
Idjwi Lake Kivu DR Congo 340 2°9′58″S 29°3′21″E
Kotasaari Kallavesi Finland 285 62°52′52″N 28°0′23″E If Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Ometepe Lake Nicaragua Nicaragua 276 11°30′0″N 85°35′0″W Made of two conjoined volcanic islands
Zapatera Lake Nicaragua Nicaragua 54 11°43′48″N 85°49′12″W
Big island Great Slave Lake Canada ~200 61°07′45″N 116°45′24″W
Mercer Island Lake Washington United States 33.4[4] 47°34′39″N 122°12′43.2″W Crossed by the Lacey V. Murrow Memorial Bridge, the second longest floating bridge in the world.
Duck Island Green Lake United States 47°40′45.9804″N 122°20′28.9098″W
Wizard Island Crater Lake United States 1.3 42°56′19″N 122°08′44″W Crater Lake itself is a caldera formed by the eruption of Mount Mazama; a series of smaller eruptions later formed cinder cones on the caldera floor, of which Wizard Island is the highest, and the only one now visible above the lake's surface.[5]
Not specified Orba Co China Highest elevation islands in the world. There are three islands of quite similar size.

Islands in lakes on islands


Samosir is in the middle of Lake Toba.
Samosir is in the middle of Lake Toba.

There are nearly 1,000 islands in lakes on islands in Finland alone.[6]

Name In lake On island Country Area
(km2)
Coordinates Notes
Samosir Lake Toba Sumatra Indonesia 630 2°35′0″N 98°49′0″E Largest island in a lake on an island.[1] Manmade from digging canal [note 1]
Gatter Island Lake Hazen Ellesmere Island Canada 0.2 81°55′5″N 69°05′35″W
Glover Island Grand Lake Newfoundland Canada 178 48°46′52″N 57°41′54″W Largest naturally occurring island in a lake on an island.
Volcano Island[8] Lake Taal Luzon Philippines 26.1 14°00′44″N 120°59′7″E
Motutaiko Island Lake Taupo North Island New Zealand 0.11 38°51′17″S 175°56′36″E
Goat Island Lake Erie Fidalgo Island United States 0.09 48.3631578, -122.5309984
Mokoia Island Lake Rotorua North Island New Zealand 1.35 38°04′50″S 176°17′05″E
Rahui Island Lake Waikareiti North Island New Zealand 38°42′45″S 177°10′30″E Largest of several islets in Lake Waikareiti
Mou Waho Lake Wānaka South Island New Zealand 1.2 44°33′10″S 169°04′50″E Largest of several islets in Lake Wānaka, including Stevensons Island
Pigeon Island Lake Wakatipu South Island New Zealand 1.7 44°55′30″S 168°23′50″E Largest of several islets in Lake Wakatipu, including Pig Island / Mātau and Hidden Island
Pomona Island Lake Manapouri South Island New Zealand 2.6 45°30′30″S 167°28′30″E Largest of several islets in Lake Manapouri; largest lake island in New Zealand
Motmot Island Lake Wisdom Long Island Papua New Guinea 0.04 5°21′8″S 147°7′2″E
Unknown name West Lake Brownsea Island United Kingdom 0.0008 50°41′34″N 1°58′21″W
Belle Isle Windermere Great Britain United Kingdom 0.17 54°21′43″N 2°56′4″W
Storgrynnan Vandöfjärden Fasta Åland Finland 0.12 60°17′46″N 19°55′12″E
Unnamed Senanayaka Samudra Sri Lanka Sri Lanka 0.02 7°12′0″N 81°31′10″E
Derrywarragh Island Lough Neagh Ireland United Kingdom 0.56 54°30′57″N 6°34′11″W
Sveta Marija Veliko jezero Mljet Croatia 0.017 42°46′8″N 17°21′37″E
Chikubu Island Lake Biwa Honshu Japan 0.14 35°25′20″N 136°8′37″E
Takeshima Lake Biwa Honshu Japan 0.6 35°17′47″N 136°10′41″E
Okishima Lake Biwa Honshu Japan 1.51 35°12′28″N 136°3′58″E Largest of the three islands located within Lake Biwa, which is Japan's largest lake.
Nakajima (Lake Kussharo) Lake Kussharo Hokkaido Japan 5.81 43°37′56″N 144°18′20″E Largest recursive island in Japan
Nakajima (Lake Toya) Lake Tōya Hokkaido Japan 4.84 42°36′07″N 140°51′11″E
Takeshima Lake Biwa Honshu Japan 0.6 35°17′47″N 136°10′41″E
Okinajima Lake Inawashiro Honshu Japan 0.07 37°30′33″N 140°02′15″E
Loeha Island Lake Towuti Sulawesi Indonesia 12.5 2°46′22″S 121°32′51″E
Lalu Island Sun Moon Lake Nantou Taiwan 0.882 23°51′20″N 120°54′40″E
Yufei Island Qingcao Lake Hsinchu Taiwan 0.00425 24°46′29″N 120°58′18″E
Unnamed Kasegalik Lake Flaherty Island Canada There are several other islands in that lake.
Isla Cabritos Lago enriquillo Hispaniola Dominican Republic 16.67 18°29'22''N 71°40'56''W
Unnamed Unnamed Cat Ba Island Vietnam 0.0005 20°46'54"N 107°05'30"E There is a smaller one, right at the south of it.
Not specified Blöndulón Iceland Iceland There are nine other islands in this lake, all significantly smaller than this one.

Islands in lakes on islands in lakes


NameIn lakeOn islandIn lakeCountryArea
(km2)
CoordinatesNotes
Kokkosaari[9] Kokkohauta Sääminginsalo Saimaa Finland 0.88 61°59′20″N 29°12′55″E Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal). Claimed by some[by whom?] to be the world's largest island in a lake in an island in a lake. Another island, Suursaari (62°5′28″N 28°59′28″E) in Hanhijärvi, is also located in Sääminginsalo, and is about half the size of Kokkosaari.
Unnamed Lake Chaunoy (Lac du Chaunoy)[10] René-Levasseur Island Manicouagan Reservoir Canada 0.44 51°33′5″N 68°49′8″W René-Levasseur Island is an artificial island, formed when the Manicouagan reservoir was flooded in 1970. There are also more than 10 other smaller islands in Lake Chaunoy, the largest of which is less than a tenth of the size of the one listed here.
Treasure Island Lake Mindemoya Manitoulin Island Lake Michigan–Huron Canada 0.4 45°45′50″N 82°10′41″W Largest natural island on a lake on an island on a lake.
Kakawaie Island Lake Kagawong Manitoulin Island Lake Michigan–Huron Canada 0.24 45°48′45″N 82°18′22″W
Ryan Island[11] Siskiwit Lake Isle Royale Lake Superior United States 0.141 48°0′36″N 88°46′15″W Largest island in the largest lake on the largest island in the largest lake in the world (Lake Superior)
Unnamed Second Lake Drummond Island Lake Michigan–Huron United States 0.044 46°03′2″N 83°35′55″W
Unnamed[12] Mackaysee Lake Chambers Island Green Bay, Lake Michigan United States 0.009 45°11′41″N 87°20′43″W
Unnamed Frith Lake Kelvin Island Lake Nipigon Canada 0.0013 49°52′29″N 88°40′53″W
Piiroonsaari[9] Saravesi Kotasaari Kallavesi Finland 0.22 62°50′41″N 28°4′36″E Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Suurisaari[9] Oininki Äitsaari Saimaa Finland 0.14
Ukonsaari[9] Kulkemus Partalansaari Pihlajavesi (Saimaa) Finland .12 61°40′9″N 28°23′43″E
Unnamed Lake Cancy René-Levasseur Island Manicouagan Reservoir Canada 0.011 51°33′21″N 68°50′52″W
Unnamed Lac des Pigamons Îlots Walcott Lake Mistassini Canada 0.0002 51°07′18″N 73°21′34″W
unnamed unnamed Wilson island Great Slave Lake Canada 0.011 61°50′7″N 112°46′57″W
Raaskasaari Kylliönjärvi Viljakansaari Pihlajavesi (Saimaa) Finland 0.05 61°33′53″N 28°22′56″E
Unnamed Unnamed Kållandsö Vänern Sweden 0.0027 58°41′52″N 13°11′18″E There is a second island in the lake, almost the exact same size
Ösjöholmen Ösjön Ammerön Revsundssjön Sweden 0.008 62°51′57″N 15°10′23″E
Unnamed Unnamed Tynnelsö Mälaren Sweden 0.0005 59°25′1″N 17°04′44″E
Unnamed Unnamed Unnamed Lake Kovdozero Russia 0.0162 66°45′23″N 31°58′37″E
Unnamed Unnamed Shaganappie Island Wollaston Lake Canada 0.0066 58°22′22″N 102°57′51″W
Unnamed Calder Lake Malcolm Island Reindeer Lake Canada 0.0154 56°58′24″N 102°8′1″W
Unnamed Unnamed Ispatinow Island Cree Lake Canada 0.00019 57°27′40″N 106°40′47″W
Unnamed Unnamed Blanchet Island Great Slave Lake Canada 0.01 61°59′40″N 112°30′56″W Several small islands in this lake
unnamed island Vanooyen Lake Shakespeare Island Lake Nipigon Canada 0.0182 49°39′36″N 88°24′10″W There is a second, smaller island in this lake.
Unnamed Margaret Lake Elk Island God's Lake Canada 0.00095 54°39′32″N 94°10′44″W Several small islands in this lake
Unnamed Unnamed Ile Guillaume Couture Lac Mistassini Canada 0.0017 50°55′1″N 73°37′32″W
unnamed unnamed Ile Tchapahipane Lac Mistassini Canada 0.00125 51°4′34″N 73°25′25″W
unnamed island unnamed lake Pie Island Lake Superior Canada 0.0086 48°13′58″N 89°3′26″W Two islands of similar size are in this lake
unnamed Muir Lake St Ignace Island Lake Superior Canada 0.00325 48°48′28″N 88°2′3″W
unnamed Antler Lake St Ignace Island Lake Superior Canada 0.0041 48°48′59″N 88°0′5″W Two islands of similar size are in this lake
unnamed island Williamson Lake St Ignace Island Lake Superior Canada 0.00425 48°48′4″N 88°1′39″W
unnamed island Molinski Lake Simpson Island Lake Superior Canada 0.01 48°49′13″N 87°42′51″W
unnamed Caribou Lake Simpson Island Lake Superior Canada 0.00465 48°45′51″N 87°39′33″W
unnamed Veronica Lake Slate Islands Lake Superior Canada 0.0065 48°39′28″N 86°59′23″W
unnamed Michi Lake Michipicoten Island Lake Superior Canada 0.0037 47°44′28″N 85°54′29″W There are 3 islands in total in this lake
unnamed Channel Lake Michipicoten Island Lake Superior Canada 0.0084 47°43′50″N 85°48′0″W A second, smaller island is immediately to the west of this one.
unnamed unnamed unnamed Knielinger See Germany 0.0003 49°01′52.5″N 8°18′34.3″E
Unnamed Unnamed Wizard Island Crater Lake United States
Not specified Lac Civic Île Bronson Réservoir Cabonga Canada There are other islands in lakes on islands in Cabonga.

Islands in lakes on islands in lakes on islands


Nameless isle within Victoria Island in Nunavut Territory in Canada.[13]
Nameless isle within Victoria Island in Nunavut Territory in Canada.[13]
Name In lake On islandIn lake On island Country Area
(m2)
Coordinates Notes
Not specified Not specified Nettilling Lake Baffin Island Canada 40,000 66°41′15″N 70°28′48″W There are more islands in lakes on the 'level 2' island in Nettling Lake.
Victoria Island Canada 16,000 69°47′32″N 108°14′26″W The sometimes cited name Inception Island is not an official name.
Aek Natonang (Locally Sidihoni Lake[14]) Samosir Lake Toba Sumatra Indonesia 13,125 2°33′52″N 98°53′0″E Two islands, the largest of which is 175 m by 75 m.
Glover Island| Grand Lake Newfoundland Canada 7,500 48°47′48″N 57°39′28″W There are several (at least seven) other, even smaller, islets in the lake
Unnamed Glover Island Grand Lake Newfoundland Canada 2,300 48°43′8″N 57°46′23″W In a lake 11 km south west to the lake that contains the larger island. There are no other island in this island's lake
Meelpaeg Reservoir Newfoundland Canada 100 48°18′44″N 56°30′48″W There are 3 other smaller islands in the same lake.
unnamed island Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 225 44°33′15″S 169°05′3″E There are two islands in this lake, both less than 25 m across.
Eilean Sùbhainn Loch Maree Great Britain United Kingdom 225 57°41′24″N 5°29′9″W Two islets, each of which is 15m by 15m
Kooryet Lake Banks Island (British Columbia) Canada ~100 53°21′7″N 129°59′30″W A number of small islets, the largest of which is only 10m across
Samosir Lake Toba Sumatra Indonesia 400 2°38′11″N 98°50′14″E
Jubilee Lake Newfoundland Canada 20 48°3′50″N 55°10′24″W Several small islets, the largest of which is about 5 m across
Cayo pajaro Laguna de Leche Cuba Cuba 832 22°13′31″N 78°40′2″W There are several other islets in the lake, all about half the area of the specified islet.

Until 2020,[15] Vulcan Point was an island that existed in Main Crater Lake on Volcano Island in Lake Taal on Luzon in the Philippines.[16] Main Crater Lake evaporated during the 2020 Taal Volcano eruption,[15] but the water in Taal Lake has returned and has a new island. Vulcan Point became a peninsula.


Islands in lakes on islands in lakes on islands in lakes


Only one lake is known to have such islands.[citation needed]

Name In lake On island In lake On island In lake Country Size

(km2)

Coordinates Notes
Manar Unnamed Unnamed Unnamed Unnamed Lake Yathkyed Canada 62°39′04″N 97°47′14″W [17]

Moose Boulder was claimed to exist in the seasonal pond of Moose Flats on Ryan Island in Siskiwit Lake on Isle Royale in Lake Superior in the United States.[18] In 2020, an expedition to the island found that it is potentially a hoax, along with the aforementioned seasonal pond.[19]


Recursive lakes


Lake Alaotra region, Madagascar
Lake Alaotra region, Madagascar

Lakes on islands


Only a few notable examples are listed.

Name On island CountrySize (km2) Coordinates Notes
Nettilling Lake Baffin Island Canada 5,542 66°29′N 70°20′W
Lake Alaotra Madagascar Madagascar 900 17.5°S 48.5°E
Laguna de Leche Cuba Cuba 67.2 22°12′33″N 78°37′17″W
Lough Neagh Island of Ireland Northern Ireland/United Kingdom 392 54°37′06″N 6°23′43″W
Lough Corrib Island of Ireland Republic of Ireland 176 53°26′N 9°14′W
Loch Lomond Great Britain Scotland/United Kingdom 71 56°05′N 4°34′W
Lake Kawaguchi Honshu Japan 6.13 35°30′56″N 138°45′36″E The largest among the Fuji Five Lakes
Þingvallavatn Iceland Iceland 84 64°11′N 21°09′W
Lake Taupo North Island New Zealand 616 38°48′25″S 175°54′28″E
Lake Wakatipu South Island New Zealand 289 45°03′S 168°30′E
Lake Biwa Honshu Japan 670 35°20′N 136°10′E Largest lake in Japan
Lake Toba Sumatra Indonesia 1130 2°40′48″N 98°52′48″W
Lake Ranau Sumatra Indonesia 126 4°51′45″S 103°55′50″E
Lake Singkarak Sumatra Indonesia 108 0°37′12″S 100°32′24″E
Lake Towuti Sulawesi Indonesia 561 2°45′0″S 121°30′0″E
Lake Poso Sulawesi Indonesia 323 1°55′28″S 120°37′0″E
Lake Matano Sulawesi Indonesia 164 2°29′7″S 121°20′0″E
Tourists on Laguna del Volcan Maderas on Ometepe Island in Lake Nicaragua
Tourists on Laguna del Volcan Maderas on Ometepe Island in Lake Nicaragua

Lakes on islands in lakes


NameOn islandIn lakeCountrySize (km2)CoordinatesNotes
Lake Manitou Manitoulin Island Lake Michigan–Huron Canada 106 45°46′42″N 81°59′30″W
Ylä-Enonvesi[9] Sääminginsalo Saimaa Finland 12 62°3′7″N 29°0′12″E If Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal). Includes Lake Saarijärvi that forms its southern part.
Kulkemus[9] Partalansaari Pihlajavesi (Saimaa) Finland 5.8 61°40′43″N 28°24′13″E
Saajuu-Palovesi[9] Partalansaari Pihlajavesi (Saimaa) Finland 4.1 61°41′55″N 28°19′34″E
Saravesi[9] Kotasaari Kallavesi Finland 4.1 62°50′49″N 28°4′52″E If Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Oininki[9] Äitsaari Saimaa Finland 2.6 61°18′52″N 28°38′21″E
Malosenjärvi[9] Viljakansaari Pihlajavesi (Saimaa) Finland 1.4 61°31′58″N 28°16′11″E
Valkiajärvi[9] Hurissalo Saimaa Finland 1.4 61°30′27″N 27°49′29″E
Ruokojärvi[9] Partalansaari Pihlajavesi (Saimaa) Finland 1.3 61°38′1″N 28°23′39″E
Närtejärvi[9] Viljakansaari Pihlajavesi (Saimaa) Finland 1.2 61°34′31″N 28°31′8″E
Kylliönjärvi[9] Viljakansaari Pihlajavesi (Saimaa) Finland 1.1 61°33′47″N 28°22′59″E
Lapinjärvi[9] Hurissalo Saimaa Finland 1.1 61°29′33″N 27°48′30″E
Shara-Nur[20] Olkhon Island Lake Baikal Russia 53°06′18″N 107°15′16″E
Siskiwit Lake Isle Royale Lake Superior United States 16.8 48°00′05″N 088°47′50″W
Lake Desor[21] Isle Royale Lake Superior United States 47°58′36″N 88°59′13″W
Lake Richie[22] Isle Royale Lake Superior United States 48°2′38″N 88°41′43″W
Lake Mindemoya Manitoulin Island Lake Michigan–Huron Canada 38.7 45°45′43″N 82°12′32″W
Lake Kagawong Manitoulin Island Lake Michigan–Huron Canada 55.6 45°50′0″N 82°18′36″W
Little Lake Washington Island Lake Michigan United States 0.17 45°24′36″N 86°56′29″W
Lake Windigo Star Island Cass Lake (Minnesota) United States 0.8 47°25′7″N 94°34′13″W
Fox Lagoon Pelee island Lake Erie Canada 0.02 41°43′57″N 82°40′18″W
Lake Henry Pelee island Lake Erie Canada 0.345 41°49′32″N 82°38′20″W
Laguna del Volcan Maderas[23] Ometepe Lake Nicaragua Nicaragua 0.034 11°26′42″N 85°30′38″W
Laguna de Zapatera[24] Zapatera Lake Nicaragua Nicaragua 0.19 11°45′59″N 85°51′25″W
Antoniyevskoye Lake Valaam Lake Ladoga Russia 0.028 61°23′18″N 30°59′48″E
Ozero Leshchevo Valaam Lake Ladoga Russia 0.27 61°21′35″N 30°55′58″E
Lake Geneserath Beaver Island Lake Michigan–Huron United States 2 45°35′55″N 85°32′23″W
Ösjön Ammerön Revsundssjön Sweden 0.58 62°51′53″N 15°10′21″E
Igelviken Färingsö Mälaren Sweden 0.47 59°21′53″N 17°42′13″E
Ändsjön Frösön Storsjön Sweden 0.32 63°10′34″N 14°34′24″E
Gråtjønna Røssvassholmen Røssvatnet Norway 0.05 65°41′46″N 13°59′47″E
Unnamed Unnamed Lake Chad Cameroon There is another, smaller lake on that island.

There are a few more islands in Lake Chad that have a lake on them.

Süvähaud Piirissaar Peipus Estonia
Unnamed Unnamed Thac Ba Reservoir Vietnam 0.05 21°50'24.7"N 104°58'02.5"E There are some extremely tiny islets in that lake.

Lakes on islands in lakes on islands


Name On island In lake On island CountrySize (km2) Coordinates Notes
Unnamed Unnamed Nettilling Lake Baffin Island Canada 1.55 66°23′15″N 69°38′41″W
Unnamed Glover Island Grand Lake Newfoundland Canada 1.40 48°48′9″N 57°39′41″W
Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 0.05 44°33′15″S 169°05′00″E
Unknown Rahui Island Lake Waikareiti North Island New Zealand 0.003 38°42′45″S 177°10′22″E
Unnamed lake unnamed island Jubilee Lake Newfoundland Canada 0.025 48°3′50″N 55°10′24″W
Unnamed lake unnamed island Mölnorträsk Fårö Sweden 0.00006 57°55′45″N 19°08′29″E Extremely small
Unnamed lake Unnamed island Unnamed lake Baffin Island Canada 70°41′14″N 80°34′18″W
Molemole Motu'a'ali Motu Si'i Niuafo'ou Tonga 0.02 15.594888°S 175.649157°W / -15.594888; -175.649157
Not specified Sandey Þingvallavatn Iceland Iceland
Not specified Gatter Lake Lake Hazen Ellesmere Island Canada Northernmost lake of its kind in the world.
Unnamed Teinholmen Vestrevatnet Osterøy Norway 60.536628°N 5.627209°E / 60.536628; 5.627209

Lakes on islands in lakes on islands in lakes


Only one such lake is known.[citation needed]

Name On island In lake On island In lake Country Size (km2) Coordinates Notes
Unnamed Not Specified Not Specified Not Specified Lake Yathkyed Canada 0.013 62°39′5.8″N 97°47′11.8″W There is, even further, an island in that lake, making it the only such island in the world that has been discovered so far.

See also



Notes


  1. Was a peninsula until 1906 when a canal was dug, separating it from the mainland.[7]

References


  1. Records, Guinness World (August 28, 2018). 2019 Guinness World Records. pp. 40–41. ISBN 978-1-912286-43-0.
  2. January 2012, Natalie Wolchover 24 (January 24, 2012). "World's Largest Island-in-a-lake-on-an-island-in-a-lake-on-an-island Seen on Google Earth". livescience.com.
  3. Québec (ministère de l’Environnement) (April 2003), "La réserve de biodiversité projetée de l'île René-Levasseur" (PDF), Bureau d'audiences publiques sur l'environnement (in French), Quebec City, p. 14, retrieved August 19, 2010
  4. "2019 U.S. Gazetteer Files". United States Census Bureau. Retrieved August 7, 2020.
  5. "Crater Lake, Oregon". NASA Earth Observatory. September 18, 2006.
  6. "Suomen saaristo- ja vesistömatkailusta" (PDF). valtioneuvosto.fi / Julkaisut.
  7. "Samosir Island - Everything you Need to Know about Samosir Island".
  8. "Volcano Island | volcano, Philippines". Encyclopedia Britannica.
  9. Shoreline - lakes (Ranta10), 2020. Finnish Environment Centre, ELY centres. Released under CC-BY-4.0.
  10. "Lac Du Chaunoy, Quebec Map". geodata.us.
  11. "GNIS Detail - Ryan Island". geonames.usgs.gov.
  12. "Islands within Chambers Island's Lake Mackaysee Now Protected by Door County Land Trust". November 8, 2018.
  13. "Island in a Lake on an Island in a Lake on an Island". earthobservatory.nasa.gov. February 22, 2015. Retrieved March 13, 2020.
  14. "Aek Natonang Lake – A Sub-Lake of Pangururan". www.toba.indonesia-tourism.com. Retrieved August 12, 2020.
  15. Freedman, Andrew; Meko, Tim; Karklis, Laris (January 17, 2020). "Taal volcano's crater lake is nearly empty". Washington Post.
  16. "Some interesting islands and lakes". Topografisch Verbond Elbruz. Archived from the original on September 19, 2013. Retrieved February 1, 2014.
  17. , 62°39′04″ N, 97°47′14″ W
  18. "Largest island on the largest lake in the world". Albert Lea Tribune. July 21, 2009. Retrieved March 13, 2020.
  19. Taub, Matthew (March 10, 2020). "The Intrepid Mother and Son Who Unraveled a Geographic Hoax". Atlas Obscura.
  20. "Shara-Nur lake". BaikalNature Tour Operator. May 11, 1975. Retrieved March 13, 2020.
  21. "GNIS Detail - Lake Desor". geonames.usgs.gov.
  22. "GNIS Detail - Lake Richie". geonames.usgs.gov.
  23. Valenzuela, Orlando. "Puerta laguna misteriosa [Door to mysterious lagoon]". El Nuevo Diario (in Spanish).
  24. "Global Volcanism Program | Zapatera". Smithsonian Institution | Global Volcanism Program.



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