It's harder and harder to find places and natural wonders that haven't been explored, but three hikers say they have made one such discovery when they ventured into a Slovakian forest.

Photographer Robert Nemeti and his friends, Istvan Gallai and Tibor Balint, said they discovered a hidden cave while they were exploring the forest near the village of Borka, Slovakia.

The cave, which is known to locals as Marcilyuka, is unmapped and only a few people from the town know about it, according to the Daily Mail.

(MORE: 14 Spectacular Caves of the World (PHOTOS))

Nemeti, Gallai, and Balint hiked up roughly 1,000 feet to find the cave’s entrance, which is said to be completely masked by the forest and hard to find.

Once they discovered the entrance to the caves, the narrow pathways proved to be another challenge. In the beginning of their decent into the cave they all had to slide in on their backs due to the tiny tunnels.

(MORE: Stunning Photos of the World's Most Remote Caves)

After the hikers made it through the narrow paths they found the cave’s inner "room."They used plastic line to keep track of their route so they could find their way out, and in total, the trip in and out took the group a little over an hour.

The slideshow above shows their journey into the unmapped cave.

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