Cahokia Mounds State Historic Site
The largest and earliest pre-Columbian city in North America.
Hopewell Ceremonial Earthworks
Two-thousand-year-old earthworks that demonstrate the Hopewell people’s knowledge of geometry and astronomy.
Considered the birthplace of the United States, where both the Declaration of Independence and the Constitution were signed.
Statue of Liberty
A potent symbol for Americans and the world, representing freedom and democracy.
Everglades National Park (on the endangered list)
A vast wilderness of water and grass, habitat for many species, including endangered.
Great Smoky Mountains National Park
A large protected area of great scenic beauty and species diversity.
Mammoth Cave National Park
An enormous cave system containing intricate rock formations that demonstrate. millions of years of geological processes.
Monumental Earthworks of Poverty Point
A remarkable achievement in earthen construction by hunter-gatherers more than 3000 years ago.
Monticello and the University of Virginia in Charlottesville
Carlsbad Caverns National Park
A natural cave complex with extensive and varied rock formations.
Well-preserved prehistoric architecture that also demonstrates ancient Puebloans’ knowledge of astronomy.
Grand Canyon National Park
A vast gorge cut over the ages by the Colorado River, revealing 2 billion years of geologic history.
San Antonio Missions
Five historical mission churches from the Spanish colonial period in Texas.
A centuries-old Puebloan community that still practices the traditional ways, living in distinctive adobe houses.
Mesa Verde National Park
Ruins of ancient cliff dwellings used over a thousand years ago by Ancestral Pueblo people.
Olympic National Park
A large and beautiful park containing mountains, old-growth forests, temperate rainforests and beaches.
Redwood National and State Parks
Four nature reserves that combine to protect the oldest and tallest trees in the world.
Yellowstone National Park
A vast nature preserve hosting many species that once roamed North America, as well as a large number of active geothermal sites.
Yosemite National Park
Bedrock eroded by glaciers makes for an exceptionally beautiful natural environment of cliffs, sequoia groves, waterfalls and meadows.
Hawaii Volcanoes National Park
Two active volcanoes and a protected habitat for endemic flora and fauna.
La Fortaleza and San Juan National Historic Site in Puerto Rico
Colonial-era structures that demonstrate defensive architecture as it was adapted from European designs for a tropical environment.
The 20th-Century Architecture of Frank Lloyd Wright
Kluane / Wrangell-St. Elias / Glacier Bay / Tatshenshini-Alsek
A huge site, significant in terms of geological processes, ecological zones, biodiversity and beauty.
Waterton-Glacier International Peace Park
Spectacular scenery and a showcase for the importance of international cooperation in protecting our planet’s wilderness.