This museum houses two of Mexico's most impressive Aztec monoliths.

This industrial Art Nouveau gem is a historic hotspot for Mexican counterculture.

The official Presidential Residence of Los Pinos became an emblem of Mexico's opulence and presidential corruption.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Diego Rivera hid various people and symbols in his first large-scale mural project.

Inside a busy metro station, an impressive mural depicts the prehispanic city of Tenochtitlán.

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

By night, this auto repair shop turns into a taquería serving up some of the city's finest al pastor tacos.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

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

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

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

66,000 pieces of art, donated by one of the world's richest men.

Part bookstore, part café, and part forest.

Frida Kahlo's childhood home, now a museum of her life and works.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

One of downtown Berlin's last reminders of its Communist past.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Where once there was a train station bathroom, there is now this German burger joint.