Covering an area of 264 sq. km, the three-island groups of Grand Cayman, Cayman Brac, and Little Cayman together form the British Overseas Territory of Cayman Islands, which are located in the northwestern Caribbean Sea. The islands are the peaks of a massive underwater ridge, known as the Cayman Ridge. These peaks just barely break the surface and flank the Cayman Trough, extending from Sierra Maestra to the Misteriosa Bank. The terrain itself is mostly a low-lying limestone base surrounded by coral reefs. As observed on the map, the two "Sister Islands" of Cayman Brac and Little Cayman are ...