This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

Plenty of old carney magic still haunts this photogenic amusement park.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

A complex and beautiful system of rice terraces covers a million acres over the mountains.

This incredible Chinese theme park may be the largest bootleg in history.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

This psychedelic tourist trap is a leisurely descent into madness.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Repository for more than 22 million pickled specimens.

The monster at the center of the Darwin Center Spirit Collection.

A clock designed to run with perfect accuracy for 10,000 years.

Charles Babbage's proto-computer, painstakingly brought to life.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A hands-off space for graffiti artists to hone and display their skills.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The anatomical-pathological collection of a man who changed surgery.