Region
Abiquiu (N.M.)
1
Adirondack Forest Preserve
1
Adirondack Forest Preserve (N.Y.)
1
Adirondack Mountains
1
Adirondack Park
1
Adirondack Park (N.Y.)
1
Adriatic Sea
1
Afghanistan
116
Africa
35
Africa South of the Sahara
3
Africa, Central
1
Africa, East
10
Africa, Eastern
1
Africa, North
2
Africa, Southern
5
Africa, Sub-Saharan
15
Africa, West
9
Alabama
5
Alaska
88
Alaska Maritime National Wildlife Refuge
1
Alaska Maritime National Wildlife Refuge (Alaska)
1
Alaska, Gulf of
1
Albania
7
Alberta
1
Alboran Sea
1
Albuquerque
2
Aleutian Islands
1
Algeria
7
Alsea River Watershed
1
Amache
1
Amazon River Region
6
Amazon River Valley
1
Amazon River Watershed
2
Amazonas
1
Amazonas (Venezuela)
1
America
15
American Samoa
2
Andaman and Nicobar Islands
1
Andes
3
Andorra
3
Angola
4
Anguilla
1
Anne Arundel County
2
Antarctic Ocean
1
Antarctica
15
Antigua and Barbuda
7
Apache National Forest (Ariz. and N.M.)
3
Apache-Sitgreaves National Forest
4
Apache-Sitgreaves National Forest (Ariz.)
3
Appalachian Mountains
1
more ...