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

This popular pilgrimage site offers a hole filled with holy healing dirt.

A famous flea market artist's studio that's full of odds and ends.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

This former insane asylum now holds a pathological anatomy museum.

One of the best collections of wax anatomical models in the world.

The largest and most famous wax anatomical collection anywhere in the world.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An 80-year-old house built out of newspapers.

An eccentric inventor's castle home with its own indoor weather system.

Ancient Egyptian relief, claimed to depict an electrical light.

A huge museum of much more than just agriculture displayed in a princess's palace.

Statue commemorating the use of ether in anesthesia.

This landmark cemetery in Boston was created more than 300 years ago.

Narrowest house in Boston.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.