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mysterious places of mountains and caves with traces of ancient life
A female Asian solo traveler and hiker is hiking in extreme terrains in a mountain in nature.
Exterior view of the ruins of the own aqueduct of the medieval town of Cherven in Bulgaria
A cave entrance in a Rock Formation in the Black Hills of South Dakota
Cave system Skocjan, Unesco's world heritage site, Slovenia.
Man relaxing walk in nature on weekend. Inside of small cave.
Caves in the rocks on the Beloretsky tract. The Beloretsky tract. Nature is in the way of the Beloretsky tract. Roads and landscape.
Confident Businessman Standing In Front Of A Natural Cave
The scenic views of Ulubey Canyon Nature Park, which is a nature park in the Ulubey and Karahallı districts of Uşak, Turkey. The park provides suitable habitat for many species of animals and plants.
rock mass, river flows at the foot of the rocky mountains, white stone rocks, nature of Russia, southern Urals, Yuryuzan river, travel idea
tufa or travertine limestone formations in Una National Park, Bosnia and Herzegovina, calcium carbonate rock, that is formed in rivers, when minerals from water settle on different types of surfaces
Two large bluff cave openings along the Mississippi River in the Alton, Godfrey, Grafton Illinois area partially hidden behind green leafy trees.
Water is at a very low level, measuring bars are on the walls to either side of the cave
Denisova caves is a cave in the Altai mountains, Siberia, Russia. The cave is of great paleoarchaeological and paleontological interest.
Man relaxing walk in nature on weekend. In front of small cave.
A Hasankeyf scenery. In the near future a bridge will be built in this area and all historical buildings will be underwater, Batman, Turkey
a cave in the chalk cliffs of the Polish Jura
View of a mysterious small cave at the village of Nestorio in northern Greece
Kırklareli, Turkey - July 9, 2020: The Dupnisa Cave (Turkish: Dupnisa Mağarası), located in Strandzha Mountain Range Kırklareli, northwestern Turkey, close to Bulgarian-Turkish border.
Landscapes - Macro - Forest - Europe, Romania
Sea cave formed by weathering of soft sandstone cliff by wave action. San Gregorio State Beach, California, USA. Within the Monterey Bay National Marine Sanctuary. Note that the cave formed along an angular unconformity - the rock strata on the right is at an angle to the strata on the left.
A small cave in Martin Brod in the Una National Park. Una-Sana Canton, Federation of Bosnia and Herzegovina. Early September
Moss covered rocks in Nimara Cave in Marmaris, Turkey
View at the natural cave entrance at the mountain
석회암 동굴의 벽 VD702
Gutmanala ancient cult site and protected geological feature: sandstone grota cave with inscriptions on its walls, Gauja National Park, Sigulda, Latvia
Daglı sinkhole, Kastamonu, Turkey
Prohodna Cave is one of the most famous caves in Bulgaria, located near the village of Karlukovo.
Kaklik Cave in Denizli, Turkey
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