According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

Small French town or alien garage?

French commune at the heart of conspiracies.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Metro station with a claim to rock n' roll fame.

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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Historic medieval fortified city in southwest France.

Ruins of a German castle on top of a towering stone pillar.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

One part local history, 99 parts gruesome haunted house.

London's smallest police station is barely the size of a phone booth.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.