A popular legend claims that the famous pizza was invented at a restaurant in this alley.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

Anne Rice, one of the most influential writers in gothic literature, is buried alongside her husband in a New Orleans cemetery.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The stone labyrinth in this New Orleans city park was laid to symbolize healing in the wake of Hurricane Katrina.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

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

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

A snapshot of the city's fascinating voodoo culture.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A celebration of capitalism in Midtown.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.