Barça football fans might see the insignia hidden in a church window as a divine sign.

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

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

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

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

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

This giant sculpture made of trash is a critique of society's wastefulness.

The history of drinking is told through 1,800 cups, chalices, and glasses at this exhibit.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This hollow steel globe is the second-largest in the world.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A mysterious shape catches the eye in this 16th-century painting.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Over time, this castle grew to encompass the entire island.

A bronze ballot box stands at the spot where Susan B. Anthony voted illegally.

Quite possibly the last cross all humans will ever see.

This 1836 church, constructed by formerly enslaved people, honors a leader in Afrocentric music.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.