This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

A deadly ancient portal to the underworld.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

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

Hidden in a Scotland museum is a copse of extinct tree stumps.

Largest lake in Great Britain measured by surface area.

Britain's only herd of free-ranging reindeer.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

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

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Recently restored menagerie of Victorian-era beasts.

360° views of the city plus five floors of optical illusions and hands-on science.

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.