Cliff dwellings built by Ancestral Puebloan people in the 1200s under overhanging rock in canyons in south-western Colorado, a UNESCO World Heritage Site. The largest, Cliff Palace, has about 150 rooms; ranger-guided tours climb ladders into it.
Book tours ahead in season. Many sites can be viewed from overlooks along the mesa-top roads.
Red sandstone buttes towering over the desert on the Arizona-Utah border, in the Navajo Nation, the backdrop to countless Western films.
More than 2,000 natural stone arches in red rock desert near Moab, Utah.
A narrow slot canyon in the Navajo Nation near Page, Arizona, with smooth, wave-like sandstone walls lit by shafts of sunlight.
A series of natural amphitheatres filled with thousands of orange and white rock spires called hoodoos.
One of the world's great natural wonders, a canyon 1.6 km deep and up to 29 km wide, carved by the Colorado River.
The view from the South Rim is stunning, but walking down into the Grand Canyon is unforgettable: you descend through layer after layer of rock up to…
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