Region
Abilene
1
Afghanistan
1
Alabama
4
Alabama-Coushatta Tribe of Texas
1
Alamo (San Antonio, Tex.)
5
Alan Henry, Lake
1
Alaska
11
Albany County
1
Albuquerque
1
Alexandria Bay
1
Alibates Flint Quarries National Monument
4
Alibates Flint Quarries National Monument (Tex.)
4
Allen
1
Alpine
2
Altus Region
1
Amarillo
7
Amarillo (Tex.)
1
Amarillo Region
1
American Canal (Tex.)
2
Amistad National Recreation Area
14
Amistad National Recreation Area (Tex.)
14
Amistad Reservoir Region (Tex. and Mexico)
1
Anahuac Field
1
Anahuac National Wildlife Refuge
7
Anahuac National Wildlife Refuge (Tex.)
7
Anderson County
1
Angelina County
1
Angelina National Forest
2
Angelina National Forest (Tex.)
1
Angelina River (Tex.)
1
Apalachicola River Watershed
1
Appalachian Basin
1
Aransas National Wildlife Refuge
7
Aransas National Wildlife Refuge (Tex.)
10
Archer County
1
Arizona
13
Arkansas
21
Arkansas River
1
Arkansas River Valley
1
Arlington
5
Ascutney Mountain (Vt.)
1
Atascosa County
4
Atlantic Coast (U.S.)
2
Attwater Prairie Chicken National Wildlife Refuge (Tex.)
2
Austin
35
Austin (Tex.)
1
Austin County
1
Austin Metropolitan Area
1
Austin Region
8
Balcones Canyonlands National Wildlife Refuge
14
more ...