The ruins of the "place of the cloud snake" sit in the middle of an urban environment.

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

This Aztec structure remained hidden until the demolition of a supermarket exposed the lost temple.

This ancient structure was built by a mysterious civilization that was largely destroyed by a volcanic eruption.

This warehouse-gallery-shop hybrid showcases Mexican craftwork at its best.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

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

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

A barbarous band of serpents guard the bases of these Aztec temples.

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

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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

The collection of intricate sculptures includes one carved from a mammoth's tusk

This mosaic made out of books represents one of Colonial Mexico's most important literary figures.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

A trompe l'oeil mural remembers the original colonial building that once stood here.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

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

The shortest river in America flows for just 201 feet.

"Polynesia on the Plains."