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The stone secret cave inside

Phong Nha Cave is a cave in Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site in Quang Binh province.

Guacharos cave with spectacular stalagmites and stalactites of various shapes. Daylight entering a hole in the top.Cave located in a forest with a lot of vegetation and humidity

Sunlight entering the cave through hole.

Red light illuminating the dark cave walls within Mammoth Cave National Park in Kentucky

Stone details in the underground cave

Close-up of the rugged rock wall lining an underground tunnel

Stairway of the tomb in the center of a pyramid at Giza, Cairo in Egypt. light at the end of the tunnel. The Afterlife of the ancient Egyptian Pharaohs

Light at the end

Spectacular underground limestone rock formations, lit up by lights, inside the Fig Tree Cave, part of the Wombeyan Karst Conservation Reserve in the countryside near Goulburn, NSW

Engelbrecht Cave - South Australia

Jomblang cave, Indonesia

Dark cave

Natural Bridge waterfall near Gold Coast Australia

A closeup shot of a cave

석회암 동굴의 벽 VD702

Gaping Gill in Ingleborough, North Yorkshire. The largest pothole in Great Britain.

Lake Cave interior with stalactites and stalacmites, South Western Australia.

inside old dirty sewer line pipe. rusty casting iron drain tube

Kaew cave at Chaiyaphum Thailand

Rocks and stones in Neptune Caves, underground rock formation illuminated with artificial light forming shadows, cracked, rough and uneven walls, Couvin, Wallonia, Belgium

Easter island, Chile.

Photograph of the walking track and forest looking out of the entrance to Yarrangobilly Caves near Talbingo in Kosciuszko National Park in the Snowy Mountains in Australia

The empty interior of a burned Redwood tree following a forest fire in Northern California, USA. The light from the sun is visible at the top of the hole, looking like a tunnel of light.

Scalinata nella roccia

Jomblang Cave, Java, Indonesia

People in Spooky Cave in Black and White.

Entrance to the karst cave in a mountain

Horizontal plandscape photo of extraordinary limestone rock formations underground lit up by lights inside the Wombeyan Caves in the countryside near Goulburn, NSW.

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