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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
cave inside a volcano on the island of Lanzarote (Canary Islands)
Santiago is also known as San Salvador named after the first island discovered by Christopher Columbus. The island consists two overlapping volcanos.
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)
Thurston lava tube. Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow, expelled by a volcano during an eruption. An easily accessible lava tube was named for the Thurston family. Hawaii Volcanoes National Park, Hawaii,  Hawaiian Islands;
Lava Tunnel, Craters of the Moon National Monument and Preserve, Idaho - United States
Opening to light
One of many lava tunnels that are allowed for turists in Santa C in Santa Cruz, Islas Galápagos, Ecuador
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Lanzarote, Spain: lava tube with climbing tops
Orbetello, Toscana, Italia: La grotta, magnifica ed unica nel suo genere, si trova nei pressi di Orbetello, nella bassa Toscana Maremmana
Hawaii Volcanoes National Park
Sally Light-foot Crab, Grapsus grapsus, Puerto Egas, James Island, Isla Santiago, Santiago Island,  Galapagos Islands National Park, Ecuador. Crustacea, Arthropoda.
Galapagos Islands - July 22, 2017: Lava tunnels of Santa Cruz Island
Thurston Lava Tube at Hawaii Volcanoes National Park
Lava Tunnel at Puerto Villamil on Isabela island of Galapagos islands, Ecuador, South America
Mature woman walking in lava tunnel. Santa Cruz island, Galapagos islands.
The tunnels formed by volcanic lava have an extension of 800 meters, it is characterized by very calm waters.
Thousands of Egyptian Fruit Bats or Egyptian Rousettes roost and fly in massive, tightly packed groups and in a cave in Queen Elizabeth National Park.
Man Standing Below Sunlight Streaming In Cave
Crater's of the Moon National Monument
Natural Stone Arch in El Hierro Canary Islands
Pahoehoe Lava, Sullivan Bay, Sullivan Bay Lava Field,  James Island, Isla Santiago, Santiago Island,  Galapagos Islands National Park, Ecuador
Lava tube in the highlands of Santa Cruz Island in Galapagos National Park, Ecuador. Santa Cruz is the second largest island in Galapagos.
Castagnacupa, Umbria, Italia: Il fondo della Grotta del Chiocchio sul Pozzo dell'Anatra a meno 540 metri
Lava Tunel on Santa Cruz Island, Galapagos Islands.
Landscape vegetation, Galapagos Islands National Park, Ecuador.
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