One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

Grant Wood painted some of his most famous works of art at this studio.

What was once a communal kitchen now serves heaping portions of hearty German fare.

This large midwestern cavern features impressive rock formations and an underground waterfall.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

The building is a gigantic piece of art inspired by the shape of a desert rose.

Ancient and modern architecture are joined in Louis Kahn's monument to democracy.

The fight to make Bengali an official language started in this stunning university hall.

This colorful palace is an oasis of calm amid the hustle and bustle of the Buriganga riverfront.

The shipyards along the outskirts of the Bangladesh capital are a flurry dangerous boat breaking and rebuilding.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Cavernous opening completely encased in Karst limestone.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.