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Sipapu Natural Bridge, Natural Bridges National Monument, Utah, United States of America, North America

Boulders and hoodoos at first light, Bisti Wilderness, New Mexico, United States of America, North America

Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Desert view point over the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The safety railed stone cliff of the Mohave Point Overlook, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Sandstone cones at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Near-full moon rising through an arch, Valley of Fire State Park, Nevada, United States of America, North America

Clouds at dawn over sandstone formations, Valley of Fire State Park, Nevada, United States of America, North America

Guedelon Castle, medieval-site, construction of a castle, using techniques and materials used in the Middle Ages, Treigny, Yonne, France, Europe

Canary Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blue Star Spring, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Mnajdra, a Megalithic temple constructed at the end of the third millennium BC, UNESCO World Heritage Site, Malta, Europe

Green meadows and mountain hut on a summer sunny day, Orobie Alps, Arigna Valley, Sondrio, Valtellina, Lombardy, Italy, Europe

Stone arch at Pedra Furada, Serra da Capivara National Park, UNESCO World Heritage Site, Piaui, Brazil, South America

Colorado chipmunk (Eutamias quadrivittatus), Rocky Mountain National Park, Colorado, United States of America, North America

Hierve el Agua (the water boils), water rich in minerals bubbles up from the mountains and pours over the edge, Oaxaca, Mexico, North America

Limestone pillars in the Pinnacles Desert, Nambung National Park, Western Australia, Australia, Pacific

Valley View with El Capitan, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Bighorn Lake, Bighorn Canyon National Recreation Area, Wyoming, United States of America, North America

High Temple (Structure N10-43), the highest temple at the Mayan site of Lamanai, Lamanai, Belize, Central America

The Pinnacles limestone formations at sunset contained within Nambung National Park, Western Australia, Australia, Pacific

Snowy, bendy country lane with stone walls and trees, Curbar Edge, Peak District National Park, Derbyshire, England, United Kingdom, Europe

Cross made of stone at church built on in the rock in Vanis Kvabebi Monastery near Vardzia, Aspindza, Samtskhe-Javakheti, Georgia, Central Asia, Asia

Silouetted sandstone formation at dawn, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Canary Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Gibbon Falls, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Sculptured rock formations, Devil's Garden, Grand Staircase Escalante, Utah, United States of America, North America

Erosion patterns in a small drainage, Bisti Wilderness, New Mexico, United States of America, North America

The Pinnacles limestone formations at sunset in Nambung National Park, Western Australia, Australia, Pacific

The Paria River flowing through Paria Canyon in the Glen Canyon Recreation Area, Arizona, United States of America, North America

Mnajdra, a Megalithic temple constructed at the end of the third millennium BC, UNESCO World Heritage Site, Malta, Europe

The Pinnacles limestone formations at sunset in Nambung National Park, Western Australia, Australia, Pacific

Desert view point over the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Caves carved in the stone of the mountain inside, Petra, UNESCO World Heritage Site, Jordan, Middle East