Region
United States
50
Arizona
47
California
28
Alaska
27
Washington (State)
24
New Mexico
21
Colorado
18
Texas
18
New York (State)
15
Pennsylvania
15
Virginia
14
North Carolina
13
Nevada
12
Arkansas
11
Hawaii
11
Wyoming
11
Michigan
10
Florida
9
Indiana
9
Maine
9
Ohio
9
Washington (D.C.)
9
Yellowstone National Park
9
Montana
8
Tallgrass Prairie National Preserve (Kan.)
8
Massachusetts
7
Minnesota
7
South Carolina
7
Big Bend National Park
6
Coconino County
6
Indiana Dunes National Park
6
Kansas
6
Maryland
6
Mohave County
6
New Jersey
6
Chesapeake and Ohio Canal National Historical Park
5
Kaloko-Honokohau National Historical Park
5
Oklahoma
5
Rio Grande (Colo.-Mexico and Tex.)
5
Tallgrass Prairie National Preserve
5
United States Virgin Islands
5
West Virginia
5
Wisconsin
5
Yosemite National Park
5
Apostle Islands National Lakeshore (Wis.)
4
Bandelier National Monument (N.M.)
4
Big Bend National Park (Tex.)
4
Blue Ridge Parkway (N.C. and Va.)
4
Cabrillo National Monument (San Diego, Calif.)
4
Cape Hatteras National Seashore (N.C.)
4
more ...