This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

These enigmatic columns tower over the ruins of an ancient Toltec city.

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Concrete construction materials turned into a fashionable capsule hotel in rural Mexico.

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

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

An Aztec snake god has taken the material form of an apartment complex.

This fantastical house shaped like a seashell brings aquatic design to architecture.

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

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

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

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

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

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

Part bookstore, part café, and part forest.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

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

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

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.