This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A little sculpture with a large wardrobe.

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

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Christ's blood preserved in a Belgian town.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

Cat art as far as the eye can see.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A sweet symbol marks the place where torturous executions were once carried out.

The most loyal of little dogs, or a Victorian era publicity stunt?

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

These medieval carvings bear scars left by Parliamentarian troops during the English Civil War.

This charming railway is one of the oldest and steepest funiculars in England.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

A reportedly haunted 14th century church is curiously facing the “wrong direction.”

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

The first peace pagoda to be constructed in the Western world sits next to a small English lake.