Ghosts of France's colonial past.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A museum of carnival attractions where you are invited to ride the rides.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The oldest stone house in Paris was built by its most famous alchemist.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Unusual outdoor collection of sculptures.

Small Chinese fishing village impeccably maintained for visitors.

Where better to stay the night than inside a trio of ancient Chinese deities representing "the good life."

China's beehive-shaped pyramids house the remains of a lost kingdom.

Stone shrouds of Prince Liu Sheng and Princess Dou Wan of the Han Dynasty, created to preserve their flesh for eternity.

An out-of-place slice of France, smack in the middle of Shanghai.

What can compare to the comforting sound of 10,000 toilets running?

This Chinese museum proves that it's a watermelon world, we're all just living in it.

It seems that the residents of of this megalopolis suddenly vanished, but they were never actually there.

This short pedestrian span is also known as the "Fairy Walking Bridge" because it looks almost magical.

A cliff-hanging restaurant.

This probably wasn't what Mao had in mind.