Region
Massachusetts
Boston
45
Cape Cod
34
Boston Metropolitan Area
29
Massachusetts Bay
15
Cambridge
13
United States
13
Boston Harbor
7
Plymouth
7
Charles River
6
Nantucket Island
6
Plymouth County
6
Ashland
5
Ashumet Pond
5
Boston Harbor (Mass.)
5
Massachusetts Military Reservation (Mass.)
5
Neponset River
5
Atlantic Coast
4
Connecticut
4
Massachusetts Military Reservation
4
Stellwagen Bank National Marine Sanctuary
4
Stellwagen Bank National Marine Sanctuary (Mass.)
4
Woburn
4
Barre
3
Camp Edwards
3
Charles River (Mass.)
3
Charles River Watershed
3
Concord
3
Holbrook
3
Millers River Watershed
3
Nantucket Shoals
3
New Bedford
3
Rhode Island
3
Somerset
3
Stoughton
3
Tyngsboro
3
Amherst
2
Ashland Region
2
Ashumet Pond Region
2
Ashumet Valley
2
Atlantic Coast (U.S.)
2
Boston (Mass.)
2
Buzzards Bay
2
California
2
Cambridge (Mass.)
2
Cape Cod Canal
2
Cape Cod Region
2
Charles River Valley
2
Charles River Watershed (Mass.)
2
Chatham
2
more ...