Montauk beaches rank among the top in the country. Great rolling breakers move in on miles of white gleaming sand. No boardwalks or development here, it’s all natural In some places low rolling dunes rim the beach, in others high cliffs. Montauk is known for its spectacular 70-foot high bluffs, which stretch all the way to the point. On the north side of Montauk the protected waters of Block Island Sound are much gentler than the ocean. Here the beaches can be rocky or sandy and provide the best beachcombing treasures.