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Pistyll y Llyn is one of the tallest waterfalls in Wales and the United Kingdom. It is a horsetail style set of falls which are located in the Cambrian Mountains about 2+1⁄2 miles (4 kilometres) from Glaspwll in Powys, Wales.

Pistyll y Llyn
Location	Powys, Wales
OS grid	SN 7536 9420
Coordinates	52°31.8822′N 3°50.3053′W
Total height	300 ft (91 m)
Watercourse	Llyfnant

It is formed where the River Llyfnant falls from Llyn Penrhaeadr for approximately 525 feet (160 metres) into Cwm Rhaeadr in two waterfalls, and a series of cascades.[1] The tallest waterfall is a single horsetail drop of 300 ft (91 m).[2][3] This is sometimes mistakenly stated as 240 ft (73 m).[4]

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