This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The view that inspired the scenes of Dracula's first landing in England.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A statue honors the children who fought Nazis in Poland.

The stately remains of Llywelyn the Great's mighty fortress.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Abandoned ship reimagined as a street art canvas.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The remains of centuries of copper mining appear like an alien landscape.

These haunting ruins belong to an ancient village that once had one hell of a view.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Cold war icon and onetime "hole" in the iron curtain.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.