In no particular order:

The Wall Drug Store (Sd)
http://www.walldrug.com/

Theodore Roosevelt National Park (ND)
http://www.nps.gov/thro/index.htm

Dry Tortugas National Park (FL)
http://www.nps.gov/drto/index.htm

Petrified Forest National Park
http://www.nps.gov/pefo/index.htm

House on the Rock (Dodgeville, Wisconsin)
http://www.thehouseontherock.com/

Yellowstone National Park
http://www.nps.gov/yell/index.htm

Custer State Park (SD)
http://www.allblackhills.com/parks/custer_state_park.php

Yosemite National Park
http://www.nps.gov/yose/index.htm

Grand Teton National Park
http://www.nps.gov/grte/index.htm