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Low angle view to the cave opening, Algar do Carvao cave, volcanic tunnel, at Terceira island, Azores
Small cave in forest at hill Zniev, Slovakia
A terrarium-like image with wet moss growing on rock walls on the left and right, and pitch black moss in the center (retouched and color processed material.
Cave system Skocjan, Unesco's world heritage site, Slovenia.
a cave in the forest. the entrance to the rock cave in the forest during the autumn. explored a rocky forest in autumn. landscape of a cave in the forest
Iluminated cave inside mediterranean forest
Italian Alps, Piedmont, Valsesia: Hollow Tree
A lush, green landscape featuring mossy rocks, trees, and other rocky formations.
Deep forest. Ravine.
Dark cave with a bright daylight spot of exit. Natural cave opening in Crimea. Entrance to the karst cave in a mountain. Inside the subterranean cave background with copy space.
Forest landscape of Norway with a vintage film look
View from deep cave with grass, hole in rocky mountain, sunset. 3d render
Switzerland travel - Mossy woodland in the Blausee forest hiking trail. Deep lush moss growth in this wetland area near the blue lake.
Landscape and nature photography
A forest of larch and fir trees in Masino Valley. Sondrio. Lombardy. Italy.
The world's biggest cave Hang Son Doong is located in the heart of the Phong Nha-Ke Bang National Park in Vietnam. It stretches more than 5 kilometers long with the height of nearly 200 meters.
View from inside of Algar do Carvão cave, inside an extinct volcano,  in Terceira  island , Azores archipelago.
Picture of natural tunnel in Moravian Karst in Czech Republic
Mossy forest floor.
Vista interior de la boca de un Volcán en las Islas Azores de Portugal
Entrance to the  Cave Gýgagjá on the south-side of Hjörleifshöfði (Iceland).
Cave in the sunny forest
Jomblang cave, Indonesia
Narrow ravines called Canoles on the Larzac plateau. Aveyron. Occitanie. France
Bush between rocks covered in moss
Cave in Rangitoto Island, New Zealand.
Lichens on trees in Horma Canyon - Küre Mountains National Park
Algar do Carvão (Cavern of Coal) is an ancient lava tube or volcanic vent located in Terceira island, in the Portuguese archipelago of the Azores. Often visited by tourists looking for adventure and nature
Close-up of abandoned railroad tunnel through bedrock in Connecticut, black and white. The Shepaug Valley Railroad ran through here from 1875 to 1948. To create the tunnel, Pennsylvania miners blasted through 235 feet of schist, a metamorphic rock. It was a very tight fit for the steam locomotive and train cars. The tunnel and footpath are in the Steep Rock Reservation, a nature preserve in Washington, CT. Some people are afraid to walk through.
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