19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Dim sum, served in a grand old theater.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A collection of full-size movie monsters opened to the public.

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

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A beautiful Victorian-era cemetery, complete with a miniature village.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

An enormous, inside-out glass globe built in 1935.

Dr Barnes' $25 billion private collection of art and arboretum.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A legendary boxing venue and ring featured in Rocky V.

No one knows who painted this mysterious mural in a Penn State basement.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

An Irish Memorial commemorating those who perished due to potato blight.

Where America's first doomsday cult awaited the end of the world.

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

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.