Tektite was founded in 1969 by four aquanaunts for the purpose of training astronauts for long trips to space. Located in Great Lameshur Bay, Saint John, U.S. Virgin Islands. The original four aquanauts stayed in the metal structure from February to April of 1969 and a second Tektite project came around in 1970. The second project facilitated about 11 different missions where 53 astronauts spent 2-3 weeks in the structure as part of their training. Both structures featured bunkers as well as a research base. The facility is no longer functioning but has been immortalized into a museum.