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Deep underground inside an abandoned mine shaft.
This special place was created when a volcano erupts in Big Island, Hawaii
Canyon Las Grietas at Puerto Ayora on Santa Cruz island of Galapagos islands, Ecuador, South America
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Stunning Verdes Cave with colorful illumination, Lanzarote, Canary Islands, Spain
Skull Cave at Lava Beds National Monument in California, USA.
Lava Tunnel, Craters of the Moon National Monument and Preserve, Idaho - United States
Santiago is also known as San Salvador named after the first island discovered by Christopher Columbus. The island consists two overlapping volcanos.
cave inside a volcano on the island of Lanzarote (Canary Islands)
Sally Light-foot Crab, Grapsus grapsus, Puerto Egas, James Island, Isla Santiago, Santiago Island,  Galapagos Islands National Park, Ecuador. Crustacea, Arthropoda.
Lanzarote, Spain: lava tube with climbing tops
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Hawaii Volcanoes National Park
Opening to light
Lava tube in the highlands of Santa Cruz Island in Galapagos National Park, Ecuador. Santa Cruz is the second largest island in Galapagos.
Orbetello, Toscana, Italia: La grotta, magnifica ed unica nel suo genere, si trova nei pressi di Orbetello, nella bassa Toscana Maremmana
Galapagos Islands - July 22, 2017: Lava tunnels of Santa Cruz Island
Pahoehoe Lava, Sullivan Bay, Sullivan Bay Lava Field,  James Island, Isla Santiago, Santiago Island,  Galapagos Islands National Park, Ecuador
Lava Tunnel at Puerto Villamil on Isabela island of Galapagos islands, Ecuador, South America
Catacombs Cave at Lava Beds National Monument in California, USA.
Sierra Negra is the name given to an extensive shield volcano on the southeastern tip of Isabela Island in the Galapagos archipelago, Ecuador1 that rises to a height of 1124 meters above sea level.2 It is joined to the Cerro Azul volcano to the west and to the north by the Alcedo volcano. It is one of the most active volcanoes in Galapagos with the most recent eruption in 2016 in the month of December and in June 2018. There are extensive lava flows between the Sierra Negra and the town of Puerto Villamil. \n\nTranslated with DeepL.com (free version)
Mature woman walking in lava tunnel. Santa Cruz island, Galapagos islands.
Man Standing Below Sunlight Streaming In Cave
Crater's of the Moon National Monument
Cave at Los Tres Ojos National Park in Santo Domingo, Dominican Republic
Thurston Lava Tube at Hawaii Volcanoes National Park
One of many lava tunnels that are allowed for turists in Santa C in Santa Cruz, Islas Galápagos, Ecuador
James Island, Isla Santiago, Santiago Island,  Galapagos Islands National Park, Ecuador. Pacific Ocean.
Volcano dark cave in southern Vietnam
lanzarote, Natural Park: volcanic crater with thick lava stream. Volcán del Cuervo, Geological heritage.
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