A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Russian Orthodox church built on an Antarctic island.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

The best place to send your postcards home from Antarctica.

Fire meets ice at the southernmost volcano on Earth.

Natural time capsule containing an alien ecosystem.

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

9,000 years of carnal history is on display at China's original Museum of Sex.

Home to around 40 different species, this forest was also the setting for "Crouching Tiger, Hidden Dragon."

This film studio and amusement park is considered one of the greatest filming locations in China.

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

This aquarium has almost as many world records as it does fish.

An impactful museum ensures notorious war crimes disguised as "medical experimentation" won't soon be forgotten.

130 replicas of world wonders squeezed into just 118 acres of space.

This historic Chinese tower was said to have been haunted by fox spirits but is now haunted by a grisly murder.

Hundreds of caves filled with thousands of centuries-old statues and murals.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

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

China's most famous acrobatics act.

Described as "the world's most blinging pool."

The tiny statues form China's only known terracotta army from the Han dynasty.

China's very own Atlantis is an ornate dynastic city resting at the bottom of a lake.

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