a ▁C ay , ▁now ▁a ▁Disney ▁Island ▁and ▁cru ise ▁ship ▁stop ▁and ▁renamed ▁Cast away ▁C ay . ▁Also ▁in ▁the ▁vic inity ▁is ▁Moore ' s ▁Island . ▁ ▁On ▁the ▁Big ▁Island ▁of ▁Ab aco ▁is ▁Marsh ▁Har bour , ▁the ▁Ab ac os ' ▁commercial ▁hub ▁and ▁the ▁Bah am as ' ▁third ▁largest ▁city , ▁plus ▁the ▁resort ▁area ▁of ▁Tre asure ▁C ay . ▁Both ▁have ▁air ports . ▁A ▁few ▁main land ▁settlement s ▁of ▁significance ▁are ▁Co op ers ▁Town ▁and ▁Fox ▁Town ▁in ▁the ▁north ▁and ▁Ch ero kee ▁and ▁Sand y ▁Point ▁in ▁the ▁south . ▁Administr atively , ▁the ▁Ab aco ▁Islands ▁const itute ▁seven ▁of ▁the ▁ 3 1 ▁Local ▁Government ▁District s ▁of ▁the ▁Bah am as : ▁Grand ▁C ay , ▁North ▁Ab aco , ▁Green ▁T urt le ▁C ay , ▁Central ▁Ab aco , ▁South ▁Ab aco , ▁Moore ' s ▁Island , ▁and ▁Hope ▁Town . ▁ ▁Geography ▁The ▁Ab aco ▁Islands ▁consist ▁of ▁lim estone ▁with ▁some ▁elev ation ▁and ▁are ▁protected ▁on ▁the ▁ocean ▁side ▁by ▁the ▁third ▁largest ▁bar rier ▁re ef ▁in ▁the ▁world . ▁The ▁c ays ▁are ▁mostly ▁green ▁with ▁mang ro ves ▁and ▁white - s and ▁be aches . ▁Most ▁of ▁the ▁islands ▁are ▁un in hab ited . ▁The ▁Ab aco ▁Islands ▁and ▁their ▁c ays ▁have ▁been ▁called ▁Out ▁Islands , ▁Family ▁Islands ▁and ▁Friend ly ▁Islands . ▁ ▁History ▁The ▁Ab aco ▁Islands ▁were