EERIE symbols have been found carved into a UK cave network by a Druid who "practised witchcraft" - but you'll have to get there first.
The mysterious markings hidden within the rugged grounds of the Peak District National Park can send shivers down the spine of any adventurer.
Rowtor Rocks in Derbyshire lies tucked away in the limestone cliffs and forgotten railway lines.
The captivating cave complex near Birchover boasts breathtaking views of the national park.
Hikers can access the area through a labyrinth of natural and manmade caves.
But people are urged to be cautious especially if accompanied by kids as the area is rugged and dotted with steep drops.
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Once you've ascended the rocky path, intricate symbols appear to be etched in to the stones.
Many rocks have been carved with symbols and pictures - including serpents, circles and cups.
A set of stiff steps, thrones and altars can also be seen in a number of places.
Although the origins of the ancient-looking carvings remain a mystery, they are believed to be handwork of local Reverend Thomas Eyre.
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He is rumoured to be a practicing Druid who conducted his mystical ceremonies in the area.
Reverend Eyre carved the symbols into the rocks in the late 18th century.
He was a member of the Ancient Order of Druids - which was formed in 1781 - that used to meet locally at the Druid Inn.
Dozens of people who ventured into Rowtor Rocks shared their experiences on social media.
Taking to TripAdvisor one said: "It would be terrifying to take young children here without proper and constant supervision, but they would just love it!
"It is so exciting, with a discovery around every corner, but also most likely a precipice, so you have been warned."
Another added: "Not a good place to take children or if you have walking climbing disabilities but if you want peace and tranquillity this is ideal."
Praising the spot, a third wrote: "Beautiful hidden treasure. We were the only people around at all that morning, which really made it even more enjoyable and added to the atmosphere."
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It comes as a network of centuries old man-made caves has been discovered "by accident".
Explorers and historians cannot explain the structures found in the small town of Royston, in Cambridgeshire.