This historic furnace was once used to produce cannonballs during the Civil War.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

Thousands of tiny squares in different colors make up this piece of street art.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

One of the smallest towns in the United States.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A unique book shop with a collection of rare tomes and a nostalgia museum.

The stoutest tree in the world.

CDMX's home for the world's culinary delights.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

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

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

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

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

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

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

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

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

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

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