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Drogarati Cave on Cephalonia or Kefalonia island in Greece.

A female Asian solo traveler and hiker is hiking in extreme terrains in a mountain in nature.

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.

canyon, mountain gorge, sun, dagestan, karabakh gorge, caucasus

Chapada dos Guimaraes - Pantanal - Brazil

The interior view of the natural and historical cave of Karaftu and the place of human habitation in ancient times in the Kurdistan province of Iran

Horizontal photography composition of wonderful and majestic underground lake, with standing water, about 130 meters long but is extended by 3.5 km underground river galleries. Image shot without people in Caves of la Balme (Les Grottes de la Balme) with blurred water with long exposure. Visited since 1807, the Caves of La Balme, located in La Balme-les-Grottes city, are one of the most outstanding natural areas in France. There are small basins (gours), draperies, stalactites and stalagmites, labyrinths, underground lake. This tourist place is located 40 km from Lyon city, in Bugey mountains, in Isere (on the border of the department of Ain), Rhone-Alpes region in France (Europe). A property release was acquired for this picture.

partially flooded underground caves catacomb.

Shapes and forms of La Cuevona cave in Las Medulas, Spain. Located in Castile and Leon, Spain, was a roman age gold mining site.

View from boat of beautiful circle-shape cave in Puglia, South Italy

Stanton's Cave is a deep cave in the redwall limestone layer, along the Colorado River in Grand Canyon National Park, Arizona. It was named for early explorer Robert Brewster Stanton.

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.

Tounjcica cave in Croatia. Sightseeing Object in Tounj. It is a village and a municipality in Karlovac County, Croatia. Clear Water and Reflection on it.

Rock wall erosion along the banks of the Musselshell river in central Montana, in western USA of North America.

The cave in Timimun abandoned city in Sahara desert, Algeria

Man Hiker Hiking in Narrow Slot Canyon - Beautiful red rock scenic sandstone canyons with man walking through canyon.

Graham Cave SP - Cave Entrance - 1998. Scanned from Kodachrome 200 slide.

$inside the cave, hole in the cave.\nBig empty cave with entrance on white isolated background$

Cave system Skocjan, Unesco's world heritage site, Slovenia.

$Sima de San Pedro is located in Spain, within the autonomous community of Aragon, a region characterized by aridity and extreme temperatures. It is a chasm of karst origin, with a mouth of about 100 meters in diameter and a depth of 108, It is considered unique in Europe thanks to its complex and rich geological structure. Right at the bottom of the pit lies a lake that is 22 meters deep and contains 560,000 cubic meters of water.\n\nThis natural beauty is known as one of the most unique and important ecosystems in the region. Its interior is formed by an exceptional example of a microclimate that hosts over 25 species of vertebrates, including amphibians, reptiles, birds and mammals, as well as important colonies of bats.The Sima de San Pedro, or the Voragine di Saint Peter, is located near Oliete, a small townThe photo is taken from the edge of a deep sinkhole in the karst scenery of the Aragon area of Spain. The view looks directly to the edge and cliff face of the chasm but also shows some of the land above it. The sky is blue.\n\nThe sinkhole is called Sima de San Pedro is located in Aragon, Spain. It is a chasm of karst origin, with a mouth of about 100 meters in diameter and a depth of 108, It is considered unique in Europe thanks to its complex and rich geological structure. Right at the bottom of the pit lies a lake that is 22 meters deep and contains 560,000 cubic meters of water.\n\nIt is a unique and important ecosystems in the region. Its interior contains a microclimate that hosts over 25 species of vertebrates, including amphibians, reptiles, birds and mammals, as well as important colonies of bats. The Sima de San Pedro, or the Voragine di Saint Peter, is located near Oliete, a small town$

Yaren, Nauru: Makwa / Moqua Well - small underground pond, once the primary source of drinking water for the inhabitants of Nauru.

Natural karst cave. Dark entrance to the cave. View inside the cave in the park at the Rozhdestveno estate, near the town of Gatchina in the Leningrad region.

Free Images: "bestof:Natural cave, mouth of Henrys Fork. Daggett County, Utah. 1870. Natural cave, mouth of Henrys Fork. Daggett County, Utah. 1870."

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Gypsum 'desert roses', Chihuahua, Mexico - Natural History Museum of Utah - DSC07463.JPG

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