Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

This working replica of the 'Friends' coffee shop is more accurate to the show than the set itself.

Ming Dynasty necropolis raided during the Cultural Revolution.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.