Kirkjuvatn (literally "Church Lake") is a small mountain lake in the bowl above the village of Fámjin, about an hour's walk on a marked path that climbs steeply behind the church. The setting is classic Suðuroy — a glacial cwm of grass and basalt with cliffs rising on either side, and on a clear day a view back across the village to the open Atlantic.
The full circuit of the lake and a return via the valley below takes around three hours and is one of the most rewarding walks on the southernmost island. Bring waterproofs and good footwear: the weather changes fast here, even by Faroese standards, and the path is boggy in stretches.