Banksy's image of a naked man dangling from the window of a sex health clinic.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

This tangled English forest looks like something right out of a fairytale.

The oldest residential street in Europe also features an optical illusion.

Two gravestones clasp hands over the religious divide.

A late-medieval Dutch castle with trick fountains in its whimsical water gardens.

This unusual elevator doesn’t stop or slow down.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

The world's tallest boat lift stands as a massive piece of industrial tourism.

A museum celebrating the Canadian forces that liberated Belgium from the Nazis replete with battlefield miniatures and multiple Gardens.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A collection of weird and wonderful art fills a former houseplant nursery.

A Cold War command center is hidden under an idyllic countryside.

An open-air sewer system that was covered piece-by-piece over 300 years.

Descend into the tunnels to experience the life of a coal miner.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

A rare example of World War I trenches from the British front.

Hundreds of caves once used to store grains and animal feed.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.