Hidden beneath the streets of London is a secret subway that only carried mail.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the world's largest collections of pathological specimens.

This South London cemetery holds the remains of more than 15,000 people.

White beach sands made of the remains of tiny, star shaped creatures.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

One of the world's largest ice festivals dazzles visitors for over a month with radiant sculptures and carvings.

The world's first hotel built in an abandoned water-filled quarry.

China's most famous acrobatics act.

This psychedelic tourist trap is a leisurely descent into madness.

A magical work of architecture where a wind turbine enables monks to levitate.

China’s breathtaking futuristic library is lined floor to ceiling with fake books.

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

Why walk on this historical site when you can zoom down instead?

Ming Dynasty necropolis raided during the Cultural Revolution.

A bisected journey through evolution's history in the heart of Beijing.

The embalmed remains of the communist leader lie within a custom crystal coffin.

This ancient Chinese observatory still contains early astronomy technology.

This sensational Chinese temple walks visitors through the 76 weird departments of the afterlife.