Region
United States
15
Colorado
3
New Mexico
3
Rocky Mountain National Park (Colo.)
3
Virginia
3
Yellowstone National Park
3
Grant-Kohrs Ranch National Historic Site
2
Grant-Kohrs Ranch National Historic Site (Mont.)
2
Great Falls Park
2
Great Falls Park (Va.)
2
Montana
2
Rocky Mountain National Park
2
Washington (State)
2
California
1
Chesapeake Bay (Md. and Va.)
1
Chesapeake Bay Watershed
1
Great Falls of the Potomac (Md. and Va.)
1
Hopewell Culture National Historical Park (Ohio)
1
Mall, The (Washington, D.C.)
1
Mount Rainier National Park
1
Mount Rainier National Park (Wash.)
1
New England
1
Ohio
1
Patowmack Canal (Va.)
1
Petroglyph National Monument (N.M.)
1
Santa Fe National Historic Trail
1
Santa Monica Mountains National Recreation Area (Calif.)
1
Santa Monica Mountains National Recreation Area Region
1
Shenandoah National Park
1
Shenandoah National Park (Va.)
1
Southwestern States
1
Washington (D.C.)
1
Wyoming
1