Fort Hommet is a fortification on Vazon Bay headland in Castel, Guernsey. It is built on the site of fortifications that date back to 1680 and consists of a Martello tower from 1804, later additions during the Victorian Era, and bunkers and casemates that the Germans constructed during World War II.

Fort Grey, colloquially known as the "cup and saucer", is a Martello tower located on a tidal rock in Rocquaine Bay in Saint Peter, Guernsey on the west coast of the island.