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

Banksy gives themself artistic license with this piece of London street art.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Macabre astrological automaton clock dating to the late 1400s.

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

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

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

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

Five miles of underground river link lake to ocean.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

This artificial ring island was built to hold cubic tons of polluted dirt.

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.

The largest 19th century panorama in the world still in-situ.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

Lombardy poplars planted to imitate the size and shape of the Cathedral of Notre-Dame de Reims.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A beautiful maze marks where three countries meet.