A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

A Nesting Doll of Churches.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

A 16th-century horror show built in a lovely Italian garden.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

An extraordinary collection of 18th century anatomical waxworks.

The mummified relic of St. Catherine sits forever on a golden throne.

100 year tradition of fist fights, marked by marble footsteps.

The only museum with its curator—and her pets—buried inside.

Go inside to really appreciate this 500-year-old technological masterpiece.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This famous city eluded concrete detection until the early 2000's.

The ancient latrines of the Greeks, in all their public glory.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.