Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Just a man taking his prehistoric pet for a stroll.

One of the largest cat sanctuaries in North America is considered a "Club Med" for felines.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

The home of the first American-born saint is one of the only curved buildings in New York.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A unique sculpture park that specializes in the huge and bizarre.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

Weird wax anatomical models reside here, as do other anatomical specimens.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

The personal library of the founder of modern neurology is open to visitors.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.