Walk 2,300 feet above the ground on the "Troll's Tongue."

An unusual sand beach in the middle of a forest.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

To the famous surrealist artist, liberty required two torches held high.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

Claude Monet was baptized in this lavishly ornate Paris church.

Statue of a decomposing prince that once held his heart in its hand.

This secret cemetery where no flag is allowed to fly holds the bodies of American soldiers convicted of heinous crimes during WWII.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

This small commune with an even smaller name appears to have an unlikely amount of dead ancestors.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

A former ironworks that was the first UNESCO industrial site.

A sandstone block marks the alleged spot where the legendary writer was conceived.

Today this former Nazi concentration camp stands as a poignant memorial to the victims of fascism, and a warning from history.

A stonemason's hilarious revenge came in the form of this peculiarly positioned gargoyle.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

The little tuxedo cat survived the trip, then languished in obscurity.

There has been an astronomical clock on this spot since the 14th century.