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Ancient Ruins & Archaeological Sites in United States

4 notable sites ranked among the world's top 100

4 Sites#20 Highest Rank

#20

📍 Colorado, United States🕐 Built: 600–1300 CE

Cliff dwellings of the Ancestral Puebloans carved into sandstone alcoves. Cliff Palace has 150 rooms and 23 kivas.

UNESCO World Heritage, best-preserved cliff dwellings in North America.

#72

📍 Illinois, United States🕐 Built: 600–1400 CE

The largest pre-Columbian settlement north of Mexico. Monk's Mound is the largest earthwork in the Americas.

UNESCO World Heritage, largest pre-Columbian city north of Mexico.

#78

📍 New Mexico, United States🕐 Built: 850–1150 CE

An ancient Puebloan ceremonial center with massive 'great houses' including Pueblo Bonito (over 600 rooms), aligned with solar and lunar cycles.

UNESCO World Heritage, Puebloan solar/lunar alignments.

#98

📍 New Mexico, United States🕐 Built: 1000–1450 CE

A multi-story Adobe dwelling continuously inhabited for over 1,000 years — the oldest continuously inhabited community in North America.

UNESCO World Heritage, oldest continuously inhabited community in North America.