The first mosque in the world to receive electricity.

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.

A war-torn Olympic relic is being overtaken by graffiti and nature.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

This abandoned airplane hanger is said to have once been a top secret launch facility.

Bridge that died in war and was resurected.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

A treasure trove of fine art is hiding inside this small medieval abbey in Gascony.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Explore an eerie, abandoned medieval citadel.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This impressive chasm is one of the longest natural underground cavities in the world.

To the famous surrealist artist, liberty required two torches held high.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

An ancient ossuary in Rouen.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A subterranean playground in an abandoned slate mine.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.