This observatory within Europe's first dark sky park offers stunning views of the night sky.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

This modern labyrinth lies in the shadow of a ruined medieval castle.

A fernery hidden by neglect is uncovered, and an ancient specimen along with it.

Legend says this cave housed a 16th-century cannibal and his family of 48.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

A remarkably well preserved tower dating all the way back to the Iron Age.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

This stately estate house features a tower covered in a bright, modern mural.

A pagan tradition of draping trees with rags eerily lives on.

A 30-acre garden inspired by the principles of modern physics.

An American ghost town hides along a side street in Scotland's capital.

This series of Scottish caves has no clear purpose other than baffling historians.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.