Lake Sørvágsvatn in Faroe Islands
Sørvágsvatn (or Leitisvatn) is the biggest lake of the Faroe Islands, situated on the island of Vágar. It covers an area of 3.4 square km, more than three times the size of the second biggest lake Fjallavatn, which also lies on the island of Vágar.
The picture you see below is actually an optical illusion. It appears as if the lake is significantly higher than the ocean. In real, the lake is only 30 meter above the sea level, but the cliff facing the camera is 100 meters high. The position of the camera and the angle of the shot makes it seem like the lake is about the same level as the cliff.
Full post: Lake Sørvágsvatn in Faroe Islands