A glacial pothole was once a hideout for a notorious Scottish outlaw.

Largest lake in Great Britain measured by surface area.

The heads of two giant mythological water horses honor Scotland's horselord past.

Spend the night in this formerly abandoned traditional Scottish village.

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

This half-finished "city of toys" was almost Italy's own Las Vegas.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

A fairy tale castle in modern Rome.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A fake Transylvanian castle houses a cathedral of antlers.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Decrepit Victorian public lift is a white-knuckle ride.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

Fortified medieval tower house with lovely roof garden.

Go inside to really appreciate this 500-year-old technological masterpiece.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.