Giant kelp forest near San Clemente Island.California96Giant kelp forest near San Clemente Island.CaliforniaA diver in a cenote near Akumal. Mexico120A diver in a cenote near Akumal. MexicoDiver in the Silfra.Thingvellir Lake. Thingvellir National Park.150Diver in the Silfra.Thingvellir Lake. Thingvellir National Park.