Built in 1782, this granite tower is a mile off the southeast corner of the Island at La Rocque.
It replaces an earlier tower on the same spot and is named after the island's Governor, General Sir Henry Seymour Conway. However round towers were later regarded as stronger than square ones and the first and last square tower to be built in Jersey was Seymour Tower.
Jersey has one of the largest tidal movements on earth, rising and falling by about 40ft (12m) with the island's landmass increasing by a third at low tide so the troops who were stationed here until 1945 were completely marooned at high tide.