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Svartsengi (Blue Lagoon) Geothermal Power Station at sunset, Grindavik, Reykjanes Peninsula, Iceland, Polar Regions
Active magma in a stream below the Tolbachik volcano, Kamchatka, Russia, Eurasia
Smoking fumaroles on Mutnovsky volcano, Kamchatka, Russia
Tourists walking through the lava landscape of the Tolbachik volcano, Kamchatka, Russia, Eurasia
Dry river before the the beehive-like mounds in the Purnululu National Park, UNESCO World Heritage Site, Bungle Bungle mountain range, Western Australia, Australia, Pacific
Visitors at an active andesite stratovolcano on White Island, North Island, New Zealand
Rock formations in the Tinajani Canyon in the Andes, photographer in foreground, Peru, South America
Dramatic early light on the Trotternish ridge as viewed from the Quiraing, Trotternish, Isle of Skye, Scotland, United Kingdom, Europe
Anden Verde, West Coast with Puerto de las Nieves and Faneque mountain, Gran Canaria, Canary Islands, Spain, Atlantic, Europe
Thingvellir National Park, UNESCO World Heritage Site, Iceland, Polar Regions
Hvitserkur rock formation, Vatnsnes peninsular, Iceland, Polar Regions
Tourist exploring White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific
Acid Crater Lake, White Island Volcano, an active volcano in the Bay of Plenty, North Island, New Zealand, Pacific
Pools in slick rock at dawn, Zion National Park, Utah, United States of America, North America
Kasha-Katuwe Tent Rock National Monument, ladder leading to ancient cave dwelling, New Mexico, United States of America, North America
The arch at White Tank Campground, Joshua Tree National Park, California, United States of America, North America
Natural Bridges National Monument, Sipapu Bridge, Utah, United States of America, North America
Fairy Chimneys rock formation near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Natural Bridges National Monument, Sipapu Bridge, Utah, United States of America, North America
Fairy Chimneys rock formation landscape near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Natural Bridges National Monument, Sipapu Bridge, Utah, United States of America, North America
Sunrise at Mather Point, South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Natural Bridge, Aruba, ABC Islands, Netherland Antilles, Caribbean, Central America
Pohutu Geyser and Prince of Wales Geyser, Rotorua, North Island, New Zealand, Pacific
Pohutu Geyser and Prince of Wales Geyser, Rotorua, North Island, New Zealand, Pacific
Cabo de Sao Vicente (Cape St. Vincent), Algarve, Portugal, Europe
Red rock cliffs and badlands, Capitol Reef National Park, Utah, United States of America, North America
Rock fin, Carson National Forest, New Mexico, United States of America, North America
Rocks in the badlands at sunrise, Bisti Wilderness, New Mexico, United States of America, North America
The Spectacles (North and South Windows), Arches National Park, Moab, Utah, United States of America, North America
Female tourist hiker and Sandstone Rock formations, Lower Antelope Canyon, Page, Arizona, United States of America, North America
Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America
Wai-O-Tapu Thermal Wonderland, North Island, New Zealand, Pacific
Limestone stalactites and stalagmites in Ballic Cave, near Tokat, Central Anatolia, Turkey, Asia Minor, Eurasia
Afternoon thunderstorm, South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Natural Bridge, Bryce Canyon National Park, Utah, United States of America, North America
Fuego Volcano, Antigua, Guatemala, Central America
Cacti on Isla de los Pescadores and the salt flats of Salar de Uyuni, Southwest Highlands, Bolivia, South America
A 4x4 on Salar de Uyuni, the largest salt flat in the world, South West Bolivia, Bolivia, South America
Upper Antelope Canyon (Tse' bighanilini), LeChee Chapter, Navajo Nation, Arizona, United States of America, North America
Falls on the Kicking Horse River, Yoho National Park, UNESCO World Heritage Site, British Columbia, Canada, North America
Dawn at Green Bridge of Wales, Pembrokeshire Coast National Park, Wales, United Kingdom, Europe
Caldeira and Bromo at 2329 m, and Semeru at 3676 m, volcanoes on Java, Indonesia, Southeast Asia, Asia
Eroded boulders at the Egg Factory, Bisti Wilderness, New Mexico, United States of America, North America
Rio Concha, Valle de Lerna, District of Salta, Argentina, South America
Greene's Rabbitbrush (Chrysothamnus greenei) growing among the Tufa towers near the shores of Mono Lake, California, United States of America, North America
Firehole Spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Volcano Tavurvur, Rabaul, East New Britain, Papua New Guinea, Pacific
Landscape of the Caldeirao do Corvo, Corvo, Azores, Portugal, Atlantic, Europe
View over the mountains surrounding Garni, Kotayk Province, Armenia, Caucasus, Asia
Bull Point, North Devon, Devon, England, United Kingdom, Europe
Sharyn Canyon National Park and the Valley of Castles, Tien Shan Mountains, Kazakhstan, Central Asia, Asia
Strokkur Geysir erupting against stormy sky, Geysir, South West Iceland, Polar Regions
West Mill Tor from Rowtor in winter snow, Dartmoor National Park, Devon, England, United Kingdom, Europe
Swirling waves on the rocky shores of Booby's Bay near Trevose Head at sunset, Cornwall, England, United Kingdom, Europe
Man wearing a flannel shirt looking at a large rock formation, Oregon, United States of America, North America
Isola Bella, Taormina, Sicily, Italy, Mediterranean, Europe
Stormy sunset over the dramatic North Devon coast, Devon, England, United Kingdom, Europe
Red sand granite beach, unusual geology, coastal views, Reawick, West Mainland, Shetland Isles, Scotland, United Kingdom, Europe
Entrance of the Orecchio di Dionisio cavern, Neapolis, Siracusa, Sicily, Italy, Europe
Autumnal hues in landscape of the Richardson Mountains, Yukon, Canada
Canary Island Pines at Teide National Park, Pinus canariensis, Tenerife, Spain
Sumeru volcano erupting, island of Java, Indonesia, Southeast Asia, Asia
Dawn at Mono Lake, California, United States of America, North America
Goblin Valley State Park, near Hanksville, Utah, United States of America, North America
Chalk stacks and cliffs at Old Harry Rocks, between Swanage and Purbeck, Dorset, Jurassic Coast, UNESCO World Heritage Site, England, United Kingdom, Europe
Beautiful rock formation, Pancake Rocks, Paparoa National Park, West Coast, South Island, New Zealand, Pacific
Cerro Balmaceda and its glacier, above Fjord Ultima Esperanza, Puerto Natales, Patagonia, Chile, South America
Kanarra Creek Canyon, Kanarraville, Utah, United States of America, North America
Balanced Rock at dusk, Arches National Park, Utah, United States of America, North America
Beauty Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Djupalonssandur black stone beach, Snaefellsnes Peninsula, Iceland, Polar Regions
Valle de la Luna (Valley of the Moon), Atacama Desert, Norte Grande, Chile, South America
View of sedimentary layers from Cape Hay, Bylot Island, Nunavut, Canada, North America
Snow-capped peaks and glaciers in Icy Arm, Baffin Island, Nunavut, Canada, North America
Tourists standing at a cold lava stream after an eruption of Tolbachik volcano, Kamchatka, Russia, Eurasia
Cold lava after an eruption of Tolbachik volcano, Kamchatka, Russia, Eurasia
Active lava stream, Tolbachik volcano, Kamchatka, Russia, Eurasia
Tourists exploring an old lava flow from an eruption of Mount Etna Volcano, UNESCO World Heritage Site, Sicily, Italy, Europe
Scala dei Turchi at sunset, Realmonte, Agrigento, Sicily, Italy, Mediterranean, Europe
Sunset over the rocky landscape of Damaraland near Twfelfontein, Namibia, Africa
Antelope Canyon, Page, Arizona, United States of America, North America
La Geria, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Brilliant orange clouds at sunrise over sandstone, Valley Of Fire State Park, Nevada, United States of America, North America
Rock formations in Oak Creek Village, Sedona, Arizona, United States of America, North America
Sandstone wall with red and salmon layers and cracks, Vermillion Cliffs National Monument, Arizona, United States of America, North America
Volcanic boulders on Navajo sandstone, Grand Staircase-Escalante National Monument, Utah, United States of America, North America
Amed, view of the coast and volcano of Gunung Agung, Bali, Indonesia, Southeast Asia, Asia
Hot stream detail at Orakei Korako Thermal Park, The Hidden Valley, North Island, New Zealand, Pacific
Looking into the ancient metropolis of the Grand Canyon from Mohave Point complete with temples, peaks, plateaus and buttes, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America
Fairy Chimneys, Cavusin, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Natural Bridges National Monument, Sipapu Bridge, Utah, United States of America, North America
Canyon de Chelly National Monument, View from Junction Overlook, Arizona, United States of America, North America
Canyon de Chelly National Monument, Junction Ruins, Arizona, United States of America, North America
Pool in slick rock at dawn, Zion National Park, Utah, United States of America, North America
Swirl erosion pattern with pink clouds at dawn, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America
Salmon-colored sandstone wall with evergreens, Grand Staircase-Escalante National Monument, Utah, United States of America, North America
Red sandstone Coyote Buttes at dawn, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America
Aerial photo of Colorado River and the Grand Canyon from Papillon Helicopter, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
El Capitan, a 3000 feet granite monolith, with the Merced River flowing through Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, Sierra Nevada, California, United States of America, North America