This historic stone bridge has an entire neighborhood clinging to its sides.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

An intricate and amazing house built by architect Karl Junker.

When the rain falls, this drain system turns into a musical instrument.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Walk through Czech history in Prague's largest graveyard.

A Jenga-style cylindrical tower of books that appears to go on forever.

Two stunning 17th-century libraries and a cabinet of curiosities.

A church of bones, decorated with 40,000 human skeletons.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

Meet the bronze beloved pet to a family of famous peeing statues.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

Buddha shrines hide within dark tunnels at this unique forest temple.

Bizarre Hindu and Buddhist sculpture park.

Thousands of bats stream out of caves every night on the edge on Thailand's second largest park.

A psychedelic labyrinth on the San Francisco bay.

The United Arab Emirates's biggest and oldest fort pays homage to a lost era.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

An abandoned desert hamlet swallowed up by sand.