Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

Where layer cakes tower above one’s head and there is never a shortage of icing.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

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

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

Part bookstore, part café, and part forest.

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

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A mysterious monument covered in a binary code marks the heart of tech.

The final resting place of New Orleans' most famous voodoo priestess.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This Parisian café sticks almost exclusively to an ethos of reuse.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

For over 300 years this little carving has been the city’s good luck charm.

How did a French journalist’s grave become the sexiest statue in the cemetery?

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

This spot along the 23.5 degree north parallel marks the northern boundary of the tropics.

A surrealist timepiece by the artist of melting clocks.

The narrowest street in Paris.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.