Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

This cemetery features modernist statues as strange as its name.

An early 20th-century bullring converted into a modern shopping center.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

These relics of the city's past now exist as a prominent modern feature.

A bit of retro transportation flair preserved in the world's largest department store.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Five candy-colored villages on the Italian Riviera.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Dine amidst exotic plants at this former royal greenhouse.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Once the home of a hermetic monk, this cave now houses a small church.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.