This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the oldest universities in the world exhibits thousands of specimens from its 700-year-old collection.

Elaborate tile work in this railway station tells the story of Portugal.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The world's oldest bookshop still in operation.

A giant scrap metal troll rests his hands on top of a dilapidated building covered in graffiti.

This unassuming retro burger joint was billed as “diner of the future” at the 1939 World's Fair.

A grand entrance to one of the world's smallest Chinatowns.

These floating gardens show what Mexico City used to look during the Aztec Empire.

This mid-century mural portrays humankind's spiritual and scientific journey.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

The only castle in North America to ever house European sovereigns.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This colorful gate stands as an entrance to the walled city of Old San Juan.