The final resting place of the great navigator, or maybe his brother.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

An architect transformed this abandoned cement factory into his castle-like workshop.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Commonly acknowledged as the only public monument to the Devil himself.

A stately palace has been converted into the world's largest cannabis museum.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Turntable anonymously received orphans, alms, and groceries.

Bacteria and algae give the salty water its bubblegum hue.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A beautiful but toxic fountain of mercury.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This massive subterranean fissure is known as the "underground Grand Canyon."

A unique hotel for the artistic soul.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

Structure built from the skulls of vanquished foes.