Region
prev ...
Glen Canyon Dam (Ariz.)
2
Glen Canyon National Recreation Area (Utah and Ariz.)
1
Gold King Mine (San Juan County)
1
Golden Spike National Historic Site (Utah)
2
Grand Canyon
1
Grand Canyon (Ariz.)
5
Grand Canyon National Park
1
Grand Coulee Dam (Wash.)
1
Grant-Kohrs Ranch National Historic Site (Mont.)
1
Great Basin
51
Great Britain
4
Great Plains
21
Great Salt Lake
1
Great Salt Lake (Utah)
1
Green River (Wyo.-Utah)
1
Green River (Wyoming-Utah)
1
Hawaii
8
High Plains (U.S.)
1
High Plains Aquifer
2
Highland (Ill.)
1
Hoover Dam (Ariz. and Nev.)
3
Houston
1
Idaho
10
Illinois
4
Independence
1
Indian Territory
2
Inland Empire (Pacific Northwest)
2
Iowa
4
Islands of the Pacific
1
Italy
1
Jacksonville
1
Jacksonville (Ill.)
1
Japan
3
Kansas
8
Kearney
1
Kenya
1
Kesterson National Wildlife Refuge
2
Kesterson National Wildlife Refuge (Calif.)
2
Kickapoo Tribe of Indians of the Kickapoo Reservation in Kansas
2
Klamath Indian Reservation (Or.)
2
Klondike River Valley (Yukon)
1
Knoxville Region (Tenn.)
1
Leadville
1
Lewis and Clark National Historic Trail
1
Los Alamos (N.M.)
2
Los Angeles
2
Louisiana
7
Lower Columbia River Watershed (Or. and Wash.)
1
Madison
1
Madison Aquifer
2
more ...