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Hawaii Volcanoes National Park
Thurston Lava Tube at Hawaii Volcanoes National Park
Phong Nha Cave is a cave in Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site in Quang Binh province.
Carlsbad Caverns - National Park are hidden in the Chihuahuan Desert in souther New Mexico have stunning stalactites hanging from the roof of caverns.
Hole in the ceilling of Furna do Enxofre, Graciosa Island, Azores
Man Hiker Hiking in Narrow Slot Canyon - Beautiful red rock scenic sandstone canyons with man walking through canyon.
Cascade Falls flows over the rocks and into the pool of water on the canyon floor.  The stream cuts through the canyon floor of Matthiessen State Park in Illinois.  This cave is along one of the walls of the canyon floor and offers a different view of the waterfall.  The light from the sun appears through the dark of the hole at the end of the cave.
Scenic view of underground cave over lake
The Cueva Palombeira, excavated vertically through the hill that presses against the gorge of La Balouta (in Las M dulas, Le n, Spain), is an artificial tunnel constructed for the evacuation of waste material from the gold mine of Las M dulas. Upon entering a few meters into the cavity, one becomes aware of a tunnel cleanly sculpted into the rock, running along the upper part of the cavern, with vertical walls and an arched ceiling. In contrast, the rest of the cavity is a narrow incision with irregular walls, exposing the structure of an ancient fossilized karst gallery. After the construction of the tunnel during the Roman exploitation period of Las M dulas, the continuous flow of mud and waste materials eroded the initial floor, carrying away the weaker materials that sealed the gallery. These materials consisted of alluvial conglomerates. As a result, the tunnel s exit is located at the highest point of a vast cone of debris that fills the La Balouta ravine and reaches the site of Salas de la Ribera, a locality directly built upon the waste materials from Las M dulas.
Wide-angle view of the colourful interior of the natural cave carved out in the cliffs of Sa Figuera Borda, a rocky, rough cove located on the western coast of Ibiza, renowned for its crystalline waters and relaxed ambience. The dazzling bright light of a Mediterranean summer afternoon, a perfectly clear sky, multicoloured walls of rock, a sailing boat crossing deep blue waters. The isle of S'Espartar can be seen at the centre of the image. High level of detail, natural rendition, realistic feel. Developed from RAW.
Hendaye, Aquitaine / France »; October 7, 2019: Photo from the cave of the rocks of Hendaye to a photographer in a sunset
Cave wall stalactites creates an abstract background
Young Male Caver Posing in Cave on Rubber Boat, Green Lake
Light at the end of the tunnel. Exit/entrance to the cave.
Sand Caves in southern Utah. These caves are natural and where used by Native Americans hundreds of years ago.
View from boat of beautiful circle-shape cave in Puglia, South Italy
View out of the Hohllay Cave in Berdorf in Luxembourg
Wide-angle view of Strada della Forra (Road of the Gorge). As the name says, a scenic road crossing a narrow gorge nearby Lake Garda, in the north of Italy, nestled in the depths of a mountain, along the rift carved by the waters of the river Brasa. Diffused light coming from the top of the crevice, high, looming walls of rock, a low tunnel cutting through the mountain, a stone kerb. Palette based on yellow and rich earthy tones, with hints of green. High level of detail, natural rendition, realistic feel. Developed from RAW.
Red light illuminating the dark cave walls within Mammoth Cave National Park in Kentucky
Cave in Gumushane in Turkey
image of the entrance to a cave
Lighting shows off selenite crystals in the gypsum walls of the Alabaster Caverns State Park, Oklahoma
Mae Sap Cave in Khun Khan National Park at Chiang Mai Province, Thailand.
Cave, rocks, underground, illuminated, yellow, tunnel, İğneada, Kırklareli, Turkey
Cave \
Colorful volcanic rocks in the Algar do Carvao cave, volcanic tunnel, at Terceira island, Azores
Water reflection causes optical illusion in Cueva de Los Verdes,  Natural Volcanic Cave‎ on Lanzarote island, Spain. wonderland concept
Cave in Chalk rock landscape of Polish Jurassic Highland  near by krakow in south–central Poland. View out of a cave at atumn time landscape
General view of the reddish caves of Can Riera very similar to the Antelope canyon in the United States.
Caves located in the Picturesque Gorge of Topolia on Crete Island, Greece
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