We dove to the recreational limit in the Blue Hole (130 ft ) but it goes on for hundreds more. One guy was totally narced and started chasing a fish to about 150 ft (doh!) before we caught him and brought him back...
おぉー…Great Blue Holeというらしく、深さは412ft(125m)だそうです。穴自体は氷河期に出来たもの。