An unparalleled diving destination and a UNESCO World Heritage site, Bikini Atoll should be visited by all serious wreck and tec divers. Very few places boast such a collection of shipwrecks, including cruisers, battleships and the USS Saratoga, a 270-meter (888-foot) aircraft carrier. In the 1940s, the USA used Bikini Atoll to test nuclear weapons on naval ships. Today, the coral reefs and fish life have recovered thanks to the limited activity in the area. Currently, there are no land-based operations, so liveaboard diving is the only way to enjoy Bikini Atoll. Typical itineraries last 7 to 14 nights, and the best time to dive in Bikini Atoll is from May to October.