This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectural monsters are devouring this palace's every door and window.

An alchemist's "magic door" stands in the middle of a Roman park.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Cryptic messages embedded in the New York City sidewalk.

Its incredible collection preserves 170 years of sewing machine history.

You would never come across this tiny green oasis if you didn't know it existed.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

Christ's blood preserved in a Belgian town.

A few steps from the site of the Tlatelolco massacre, this museum tells the story of Mexico's 1968 student protests.

Its exhibits are dedicated to educating the public about state terrorism in Mexico.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

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

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

You can release a young butterfly at this beautiful indoor garden.

The unique collection of gifts includes braids of human hair, a spoon, and a Virgin made of bread.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

An extravagant 18th-century fountain built with bits of broken ceramic.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

At a museum of everyday objects, it is the act of collecting that is really on display.