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

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Dim sum, served in a grand old theater.

Museum dedicated to awful artwork.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

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

The Boston square dedicated to the dark poet who was born nearby.

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

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

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

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

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

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

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

A retrofuturistic art installation in the Pittsburgh Airport.

A giant ball made from pieces of an old Jeep.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.