Abstract: The present invention provides an enclosed, in-ground, temperature-controlled super dive tank for recreational diving and/or dive training purposes. The super dive tank has a length ranging between about 100 to about 200 feet long and a width ranging between about 50 to 150 feet wide. The depth of the tank ranges between about 50 to 80 feet deep. The present invention also provides a method for simulating open water diving by a diver, comprised of diving in an enclosed, in-ground, temperature-controlled super dive tank up to depths ranging between 50 to 80 feet. The present invention thus provides a diver with as natural a diving experience as one would have if one were diving in a coral reef in an ocean.