This Polish cave has housed a dragon, a brothel, and an enduring legend.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Over time, this castle grew to encompass the entire island.

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

This fairytale medieval church in Poland originally spent centuries in Norway.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

The oldest of the three remaining bridges in England with buildings on top of them.

Modern commuters still pass through this 2,000-year-old Roman archway.

Used as an example in one of the first dictionary entries for "museum" in 1706.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A naturally mummified 2,000-year-old man.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

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

A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

These fantastically named natural pools look like something out of a Scottish myth.

An unpaid bill, a stolen stone, and a famous fashion designer rest peacefully alongside a heroine of Highlands history.

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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.