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

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Bacteria and algae give the salty water its bubblegum hue.

A Spanish town built into the cliffs.

Rare karst landscape eroded from a flat seabed.

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

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

The earliest known map to show America, discovered by accident at a Paris bookshop.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This constantly evolving art space saved an Italian town from its own crippling reputation.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Artist Diego Morlin's war between the natural and human worlds is a wanderer's delight.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

Geometry and mystery come together in an epic show of octagonal masonry.

Rome's ancient Etruscan rival, now a park full of ruins.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.