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

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

A Nesting Doll of Churches.

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

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

It's clear this abandoned Art Deco gem was no ordinary cleaners.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

The second oldest continuously operating bar in Louisiana.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

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.

Nothing says indulgence like a 1,500-pound chocolate castle.

A whimsical, but often overlooked clock in Park Avenue.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

A very classy 1920s-era bar right in Grand Central Station.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Priceless space junk on display in front of a local Dairy Queen.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.