National Geographic : 1945 Feb
Once a Fortress, the Circular, Peaked Tower at Frederiks Has Served asaPrison In the one-room interior, rings fastened to heavy timbers show where prisoners were shackled. Seen from Christians0,the channel was arefuge forViking pirates. Now it is the home of fishermen, whose white smacks gleam at their moorings. Bleak Frederiks0 and its neighbors are Denmark's most secluded outposts intheBaltic.