These otherworldly images give a rare glimpse inside caves barely ever seen by the human eye. With its peculiar pools of water and strange colored sediments, the bizarre looking tunnels of the Shakuranskaya cave could be a set straight out of a science fiction film. Found in the disputed region of Abkhazia, around 75 miles outside of Sochi, Russia, it is rumored the incredible underground chambers were formed after a huge earthquake struck the area in 1892. After causing part of a nearby mountain to collapse into the Amtkel River, it is thought the dam-like affect has created a series of interconnecting underground tunnels. Here: a large pool of water inside one of the tunnels. (Photo by Vladimir Mulde/Caters News)

Youth category winner: Symphony No 5 by Giacomo Redaelli (Italy). (Photo by Giacomo Redaelli/2019 Nature Photographer of the Year)

Shimmering clearest blue and stretching as far as the eye can see, this is one of Iceland's famed crystal ice caves. The giant solid waves look frozen in time but they are slowly moving along as part of the Vatnajokull Glacier – which stretches across eight per cent of the island. The images were captured in February 2014 by British photographer Rob Lott, 49. Photo: A wide view of Rob Lott in the crystal ice cave in the Vatnajokull Glacier, Iceland. (Photo by Rob Lott/Barcroft Media)

A photographer takes pictures as the sun rises over the city of Kronberg near Frankfurt, Germany, Monday, November 4, 2024. (Photo by Michael Probst/AP Photo)

This adventurous husband and wife who are PAID to explore the world will give you a serious case of wanderlust. The Best Job in the World author, Ben Southall from Petersfield, Hampshire and his stunning Australian wife, Sophee are the definition of couple goals. The loved up pair with a taste for the extreme, launched, The Best Life in the World, last year with an incredible 34,000 mile journey from Singapore to London – in a mustard Land Rover. Here: Ben Southall’s wife, Sophee, takes a moment in Turkmenistan . (Photo by Ben Southall/Caters News Agency)

Raccoon Fritzi eats at the home of veterinarian Mathilde Laininger in Berlin, Germany, January 27, 2022. She cares for four raccoons that can no longer be released into the wild. Raccoon Fritzi has an Instagram account with ten thousand followers. (Photo by Hannibal Hanschke/Reuters)

A woman dressed in a traditional Ukrainian embroidered shirt holds her cat as she take part in an embroidered shirt parade in central Kiev, Ukraine, May 27, 2017. (Photo by Gleb Garanich/Reuters)

The new EVR system which allows the recording of television programmes which can then be watched at the owner's discretion. The new Teleplayer has been produced in partnership with Rank Bush Murphy Ltd and EVR and has enormous potential. 21st September 1970. (Photo by Central Press/Getty Images)