The Dyavolska reka (Bulgarian: Дяволска река, "devil's river") is a river in Burgas Province, southeastern Bulgaria. It originates in the Strandzha mountains, runs near the coastal town of Primorsko, and flows into the Black Sea. In its middle course, it forms a marshy area known as Dyavolsko blato (Bulgarian: Дяволско блато, "devil's swamp").

This article does not cite any sources. (January 2020)

Dyavolska reka
The mouth of the Devil's River
Location
Country	Bulgaria
Physical characteristics
Mouth
• location	Black Sea
• coordinates	42.2650°N 27.7545°E / 42.2650; 27.7545
Length	37 km