This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

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

A pair of gigantic baby heads greet passengers at Atocha Station.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

France's most famous cemetery, with some of its most curious tombs.

The tomb of history's greatest potato promoter is surrounded by tubers.

It houses the remains of a 17th-century version of the Titanic.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A Hawaiian stairway to heaven—that you can't climb.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Solitary monument dedicated to the beauty of nature.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Southern Italy's spinning top village.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.