Bréhon Tower, Sea fort and lighthouse in Little Roussel Channel, Bailiwick of Guernsey
Bréhon Tower is a circular stone fort and lighthouse built on a small rocky islet in the channel between Guernsey and Sark. It rises about 62 feet (19 meters) high, has three internal levels, and emits a white light signal every two seconds for passing ships.
The tower was built between 1856 and 1857 as part of British efforts to strengthen coastal defenses against French fortifications near Cherbourg. Before that, a simple obelisk had marked this spot since 1744.
The tower is visible from the shores of Guernsey and serves as a familiar landmark for sailors and fishermen who know these waters well. Its flashing white light remains a reference point at night for anyone crossing the channel between the two islands.
Getting to the tower requires a boat, as it sits on an isolated islet in open water well away from shore. The structure is not open to visitors, but it can be seen clearly from the Guernsey coastline or from a boat passing nearby.
During World War II, German forces mounted anti-aircraft guns on the tower and used it to fire on several aircraft passing overhead. This gives the structure a military history that goes well beyond its original role as a navigation aid and coastal fort.
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