Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Bacteria and algae give the salty water its bubblegum hue.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Week-long block party becomes a competition for the best decorated street.

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

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Mountain where Jesus was first tempted by the Devil.

Wonderland replication in progress by one persistent man.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A gorgeous stone viaduct crosses over a bucolic valley.

An abandoned 19th-century iron factory perched along the outskirts of an idyllic village.

The largest fountain in Bratislava.

The ruins of a 13th-century monastery that long served as a place of refuge from wars and raids.

The world's newest astronomical clock is also its most accurate.

A unique hotel for the artistic soul.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

A monument to the small town of master violin makers and its countless luthiers.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.