This artificial cave looks like something out of a fairytale.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

The first museum in the world devoted to sexual gadgetry.

Countless grotesque faces stare out from this eerie Prague art wall.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This serene bamboo walkway allows Buddhist monks from remote temples access to the nearby village.

Bizarre dirt trail winds a narrow path above the tree line.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

This French colonial post office is arguably the grandest in all of Southeast Asia.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.