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Wild Horse Window is an astonishing natural bridge located in the southeastern section of the San Rafael Swell.

Ancient Mayan (Yucatan) drawings in a cave in Cuba.

Nabataean Aqueduct Irrigation Water Supply System in the Siq of Petra, Jordan

Hercules Leg Cave at Lava Beds National Monument in California, USA.

Houses carved in the rock. Ilhara valley. Cappadocia, Turkey

Young Japanese man rock climbing in an extreme location op a huge rock face

Rhyolite is a type of extrusive igneous rock characterised by its light color, high silica content, and fine-grained texture. It forms from the rapid cooling of magma on the Earth's surface and is often associated with volcanic eruptions. Rhyolite is rich in silica (SiO₂), typically containing more than 70% silica. It is composed mainly of quartz and feldspar, with minerals like biotite, hornblende, and pumice often present.

Carved mountain rock surface and cave entrance

Transformation Panel of the Ochre Alcove in the San Rafael Swell between Hanksville and Green River, Utah.

Puerco River Valley anthropomorphs, zoomorphs, katsinas, tracks, hands, geometrics in manganese and iron oxide.

Black sign of the Soviet Union painted on an old stone rock

panoramic view of a massive Salt Mine Cave in Garmsar of Iran

Emigrant signatures along the historic California Trail at City of Rocks National Reserve, Idaho

Derinkuyu cave city in Cappadocia Turkey

Mexico, Baja California Sur, Mulegé: The Rock Paintings of Sierra de San Francisco is the name of the prehistoric rock art pictographs found in the Sierra de San Francisco mountain range in Mulegé Municipality of the northern region of Baja California Sur state, in Mexico.

Striped lines in yellow and white painted on a rock, orientation sign to hikers.

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Unique underground geology of stalactites and stalagmites.

Hiking Trail To the Right Sign in Big Bend

Exploring petroglyphs in ancient rock dwellings and analysing the ancient drawings.

Cave at Cueva Cuatro Puertas on Gran Canaria,Canary Islands,Spain,Europe

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Well-preserved drawings carved on the rock surface by people during the time of King Solomon in the national park Timna, near the city of Eilat, Israel

Lava Tubes are collapsing around the Queen's Bath area of Hawaii.

Close up inside view of texture of wall of Quadirikiri cave. Aruba.

Top view of the canyon in the Colorado plateau with sky and clouds.

Side of stony cliff with multiple geologic layers of sedimentary rock

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

Simple road sign along the winding Bhutanese moutain roads to remind the driver to blow the horn.

Various valleys and gullies of water at the bottom of Lake Cerkniška in Slovenia. The lake thus dries up and flows into underground rivers approximately every 50 years.

Free Images: "bestof:Pictograms-nps-land-spelunking-caves.svg pictograms used by the United States National Park Service A package containing all NPS symbols is available at the"

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