Region
Texas
United States
105
New Mexico
54
Mexico, Gulf of
41
Houston
28
Oklahoma
26
Louisiana
24
Mexico
24
El Paso
21
Gulf Region
18
Austin
15
San Antonio
15
Edwards Aquifer (Tex.)
13
Galveston Bay
11
Palo Duro Basin
10
Trinity River Watershed
9
Big Bend National Park (Tex.)
8
Big Thicket National Preserve (Tex.)
8
Brazos River Watershed
8
California
8
Dallas
8
El Paso County
8
Montana
8
Texas Panhandle
8
Waco
8
West (U.S.)
8
Arkansas
7
Big Bend National Park
7
Fort Davis National Historic Site (Tex.)
7
Fort Worth
7
Hudspeth County
7
North America
7
Palo Alto Battlefield National Historical Park (Tex.)
7
Presidio County
7
Alaska
6
Bexar County
6
Brewster County
6
Deaf Smith County
6
Idaho
6
Kansas
6
Nevada
6
New York (State)
6
Rio Grande Valley (Colo.-Mexico and Tex.)
6
San Antonio (Tex.)
6
Southwest, New
6
Alamo (San Antonio, Tex.)
5
Arizona
5
Austin Region
5
Colorado
5
El Paso (Tex.)
5
more ...