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

France's most famous cemetery, with some of its most curious tombs.

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

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A unique geological area spiked with wind-carved rocks that resemble teepees.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A sulfuric hellscape in southern Italy.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Eight "Guardians of Health" protect this art deco water tower from pollutants and bacteria.

Secret hideaway for an alternative beach experience.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The words of the neighborhood's most famous poets adorn four concrete walls.

The mummified relic of St. Antoninus.

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Fake rail crossings mark the site of an influential doctor's demise.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The remains of a ruined mansion memorialize the 1906 earthquake.