A lush indoor jungle fills this bustling Madrid transportation hub.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

An ancient Egyptian temple in the middle of Madrid, Spain.

Mountain where Jesus was first tempted by the Devil.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

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

This striking building appears to defy gravity, a tower balancing atop a much smaller cube.

The world's largest collection of Don Quixote-inspired art.

The former home of surrealist Edward James, who gave Xilitla its main attraction.

One of the oldest hospitals in the Americas is now decorated in hallucinatory murals.

This colonial-era hospital chapel is now a foyer and side entrance to a popular department store.

This centuries-old mine remained hidden beneath a hotel bar until 2013.

The former Mexican president kept the bullets that killed his predecessor on display in his home, now a museum.

This immense scene of a cosmic battle between a jaguar and serpent illustrates the Aztec concept of the duality of life.

Climb through the life of a Mexican hero as you ascend a 130-foot statue.

This art shopping center still boasts pieces of its past as a textile factory.

The enigmatic skull gazes out over the ruins of a once-great Mayan city.

This ornate church designed by a self-taught architect is an eclectic masterpiece in the heart of Central Mexico.