The Sheraton Harborside Portsmouth is just two blocks away from Market Square, the center of historic Portsmouth, and is directly across from the Isles of Shoals Steamship Company dock which offers daily harbor and whale watch cruises. From its va ntage point on the Piscataqua river, the hotel looks out onto the coast of Maine and ships from around the world. The Hotel offers Traditional, Deluxe, and Club Level Guest Rooms, in addition to Port of Call Suites, each with a balcony overlooking the harbor, gas fireplace and kitchen.