Mexico City's residents are being watched by this state surveillance headquarters, designed by architects with a flair for intimidation.

A massive yet whimsical statue pays homage to the art and joy of "flight."

This restored opera house is named after a soprano known for tragic romance, exile, and a truly uncomfortable wedding.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

The Rio Lerma (Chignahuapan) in El Salto, Mexico, is one of the most polluted rivers in the world. It’s covered in white foam, and falling in can kill.

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

This giant expressionist head crowns a museum devoted to a beloved Mexican leader.

Bright, rebellious indigenous murals dating back to the Spanish Conquest inexplicably cover the walls of this Catholic church.

Kitschy horror displays now fill the house where some very real serial killing took place.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

Hotel designed around a 16th century Mexican bullring.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

A hacienda that features all things uniquely Yucatán.

This singular broken monument, now housed in a museum, was the cause of a worldwide "Mayan Doomsday" phenomenon.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The stoutest tree in the world.

This ceremonial Mexican square looks as though it belongs in a science fiction movie.

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

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

The winter home of millions of migrating monarch butterflies.

Twelve natural mummies are displayed in the crypt of this former monastery school.

Diego Rivera's massive tiled fountain and failed infrastructure project.