St. John's Sinkhole is a cave in Gibraltar #2, St. Ann. A point of interest worth visiting. Located at TYDIXON, Gibraltar #2. Listed on Higgler as part of the Caribbean digital marketplace, this cave in Gibraltar #2, St. Ann is one of the many points of interest available to browse. Visit higgler.org to discover similar listings nearby, see opening hours and contact details, or claim this listing if you are the owner.