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Panorama of a ridge in the Devil's Playground of crumbling hoodoos, Petrified Forest National Park, Arizona, United States of America, North America

Aerial of the desert at the archaeological site of La Quemada (Chicomoztoc), Zacatecas, Mexico, North America

People walking home across Nam Cuong sand dunes, Ninh Thuan, Vietnam, Indochina, Southeast Asia, Asia

The northwest slope of the Purple Peninsula in Petrified Forest National Park, Arizona, United States of America, North America

Tomb of Lihyan son of Kuza, Madain Saleh (Hegra) (Al Hijr), UNESCO World Heritage Site, Al Ula, Kingdom of Saudi Arabia, Middle East

Gate of Domitian and Trajan, northern entrance of the Temple of Hathor, Dendera Temple complex, Dendera, Egypt, North Africa, Africa

Midway Geyser Basin thermal activity from the Fairy Creek Trail, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Hot Springs, Lower Geyser Basin, Yellowstone National Park, Wyoming, United States of America, North America

Beach grass growing in sand dunes along the beach at Phalassarna (Falassarna) on the Western coast of Crete, Greece, Europe

Smoking Kilauea Summit Lava Lake in the Hawaii Volcanoes National Park, UNESCO World Heritage Site, Big Island, Hawaii, United States of America, Pacific

Landscape Arch with sunburst through tree, Arches National Park, Utah, United States of America, North America

Starry sky viewed through Broken Arch, Arches National Park, Utah, United States of America, North America

Grand Prismatic Spring and bacterial mats, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming, United States of America, North America

Organ pipe cactus (Stenocereus thurberi), at night in Organ Pipe Cactus National Monument, Sonoran Desert, Arizona, United States of America, North America

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

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

A balloon pilot adjusting the burning gas jets that heat air inside the balloon, during the Bristol International Balloon Fiesta, England, United Kingdom, Europe

Joshua tree (Yucca brevifolia), at night in Joshua Tree National Park, Mojave Desert, California, United States of America, North America

Desert mountain landscape surrounding Entallada lighthouse overlooking the ocean, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

View from South Rim at sunrise, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A giant petrified log on the Purple Peninsula in Petrified Forest National Park, Arizona, United States of America, North America

Aerial of the Rock Art in the Ha'il Region, UNESCO World Heritage Site, Jubbah, Kingdom of Saudi Arabia, Middle East

The Petra Treasury (Al-Khazneh), Petra Archaeological Park, UNESCO World Heritage Site, one of the New Seven Wonders of the World, Petra, Jordan, Middle East

The Luxor Temple at night, a large Ancient Egyptian temple complex constructed approximately 1400 BCE, UNESCO World Heritage Site, Luxor, Thebes, Egypt, North Africa, Africa

Grand Geyser erupts, forcing steam high into the air, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Midway Geyser Basin thermal activity from the Fairy Creek Trail, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Silhouette of Balanced Rock at dusk, Arches National Park, Utah, United States of America, North America

View of Glen Canyon Recreation Area from the middle of Lees Ferry Road at Marble Canyon, Arizona, United States of America, North America

Mesquite flat sand dunes in Death Valley National Park, California, United States of America, North America

Rocky panorama of the high Atlas mountains in Morocco with a cloudy sky, Morocco, North Africa, Africa

Rock Art in the Ha'il Region, UNESCO World Heritage Site, Jubbah, Kingdom of Saudi Arabia, Middle East

Boiling mud pools and stream at Seltun, part of the Krysuvik goethermal area on the Reykjanes Peninsula, Iceland, Polar Regions

Steam rising from side of Mount Tongariro, Tongariro National Park, UNESCO World Heritage Site, North Island, New Zealand, Pacific

Dasht-e Lut (Lut Desert), Rock formations called Kalut, World's hottest place, Kerman Province, Iran, Middle East

Landscape view through Navajo Arch, Arches National Park, Utah, United States of America, North America

Landscape Arch with sunburst through tree, Arches National Park, Utah, United States of America, North America

View of Delicate Arch through Frame Arch with sunburst, Arches National Park, Utah, United States of America, North America

Saguaro cactus (Carnegiea gigantea), photographed under a waning moon in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

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

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

Adult vicunas (Vicugna vicugna), in the Andean Central Volcanic Zone, Antofagasta Region, Chile, South America