The Thridrangaviti lighthouse, also known as the Thridarangar lighthouse, was constructed by a group of skilled mountaineers.

Erected in 1939, the world’s most secluded lighthouse is located off the southwest coast of Iceland Sometimes called Thrídrangaviti or Þrídrangaviti, Thrídrangar is an extreme lighthouse ...

The lighthouse, which sits almost 50 miles off the coast north of Marquette, was built to warn ships of a dangerous shallow reef that was notorious for causing shipwrecks.