Mussenden Temple is a circular building located on the north coast of Northern Ireland. It was built in 1785 by Frederick Hervey, the 4th Earl of Bristol, as a summer library. The temple is perched on the edge of a 120-foot cliff, offering stunning views of the Atlantic Ocean and the nearby Downhill Demesne. The temple is now a popular tourist attraction and is open to the public.

don't forget to look at it from the beach too and there's a sauna on the beach sometimes.