Two-thousand-year-old earthworks that demonstrate the Hopewell people’s knowledge of geometry and astronomy.
A remarkable achievement in earthen construction by hunter-gatherers more than 3000 years ago.
Home to a centuries-old culture of agave cultivation for production of Tequila.
A city of magnificent pyramids and temples left by an ancient civilization.
Five historical mission churches from the Spanish colonial period in Texas.
An enormous cave system containing intricate rock formations that demonstrate. millions of years of geological processes.
Well-preserved prehistoric architecture that also demonstrates ancient Puebloans’ knowledge of astronomy.
A vibrant Spanish colonial city and an ancient pre-Columbian city.
A large and beautiful park containing mountains, old-growth forests, temperate rainforests and beaches.
A large protected area of great scenic beauty and species diversity.
A colorful Spanish colonial town surrounded by fortifications.
Two Baja California lagoons used by gray whales for giving birth and mating.
The largest and earliest pre-Columbian city in North America.
An intact Renaissance city full of Spanish-colonial baroque architecture.
Ruins of ancient cliff dwellings used over a thousand years ago by Ancestral Pueblo people.
A natural cave complex with extensive and varied rock formations.
A site containing fossils of the earliest complex organisms, marking an important turning point in evolutionary history.
An agricultural area that commemorates the history of the Acadians and their expulsion from Canada.
A colonial-period silver-mining center, with subterranean streets and Baroque architecture.
A lovely city that illustrates Spanish colonial-era architecture, city planning, and culture.
Four sets of pre-Columbian ruins that exemplify Mayan art and architecture when Mayan civilization was at its height.
Once the capital of a vast Mayan kingdom, now a large complex containing beautiful ruins of altars and stelae.
A Spanish colonial city: the first permanent European settlement in the Western Hemisphere.
Seven parks encompassing all the grandeur of the Canadian Rockies with magnificent mountain scenery.
North America’s only fortified colonial city, with an intact core, some of which dates back to the 17th century.
Four nature reserves that combine to protect the oldest and tallest trees in the world.
An area of natural beauty which illustrates the process of continental drift.
Two active volcanoes and a protected habitat for endemic flora and fauna.
A vast gorge cut over the ages by the Colorado River, revealing 2 billion years of geologic history.
Colonial-era structures that demonstrate defensive architecture as it was adapted from European designs for a tropical environment.
Mayan ruins, outstanding particularly because of their well-preserved architecture and elegant art.
The first proven European settlement in North America, established 1000 years ago in Newfoundland.
Spectacular scenery and a showcase for the importance of international cooperation in protecting our planet’s wilderness.
Ruins of Spanish colonial-era fortifications extending along the Caribbean coastline of Panama.
A vast nature preserve hosting many species that once roamed North America, as well as a large number of active geothermal sites.
A vast wilderness of water and grass, habitat for many species, including endangered.