Fodor's Expert Review Great Bay Estuarine National Research Reserve

Just inland from Portsmouth is one of southeastern New Hampshire's most precious assets. In this 10,235 acres of open and tidal waters, you can spot blue herons, ospreys, and snowy egrets, particularly during the spring and fall migrations. The Great Bay Discovery Center has indoor and outdoor exhibits, a library and bookshop, and a 1,700-foot boardwalk, as well as other trails, which wind through mudflats and upland forest.