The Cayman Islands, which are a British Overseas Territory in the western Caribbean, have some of the best diving in the world. Crystal-clear waters in striking shades of blue slosh upon the shores of this trio of tropical isles, which includes Grand Cayman, Cayman Brac, and Little Cayman. Coral reefs ring all three islands, shipwrecks are scattered off their shores, and steep underwater walls teem with marine life. The popular cruise port of Grand Cayman is the largest and most Americanized of the three islands. Stunning Seven Mile Beach is its crown jewel, with a range of water sports and beachfront resorts.