Treasure Cove is a full-service marina with a resort atmosphere located on the Peconic River situated at the center of Long Island's Twin Forks. The marina is next door to Long Island Aquarium and Exhibition center in the town of Riverhead. A "first class" Marina offering not only a boat slip but a place to relax & have fun! Our prime docking location allows you to enjoy quiet mornings or evening on the water. Well sheltered, floating docks with up to 50 amp electric & cable TV accommodate power boats up to 65 ft.NOW OPEN! Hyatt Place Hotel with two swimming pools, exercise room and 24 hour cafe. Beautiful suite rooms.