Mesa Verde National Park
Yellowstone National Park
Everglades National Park
Grand Canyon National Park
Independence Hall
Kluane / Wrangell-St. Elias / Glacier Bay /
Tatshenshini-Alsek
Redwood National and State Parks
Mammoth Cave National Park
Olympic National Park
Cahokia Mounds State Historic Site
Great Smoky Mountains National Park
La Fortaleza and San Juan National Historic Site in Puerto Rico
Statue of Liberty
Yosemite National Park
Chaco Culture
Hawaii Volcanoes National Park
Monticello and the University of Virginia in Charlottesville
Taos Pueblo
Carlsbad Caverns National Park
Waterton Glacier International Peace Park
Papahnaumokukea
World Heritage Sites in the United States of America
You forgot Rocky Mountain National Park. I saw the heritage sign years ago.