This recreation of a 19th-century dime museum is full of oddities.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

Pennsylvania's own Roswell-style UFO mystery.

Pennsylvanian mass grave and possibly mass murder.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

In which a local geological marvel becomes a quaint roadside attraction.

In the early 1800s, surgery was also a show.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Mysterious rocks that ring musically when struck.

World's first "penitentiary," meant to be humane, drove men insane.

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

255 feet of suds, scrubbers, and blow dryers.

It's always game time at Stockholm's only museum devoted solely to video games.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

The world's first ice hotel is still one of the most elaborate and beautiful.

This Stockholm light tower can be controlled by anyone with a smartphone.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

Human skulls and a stuffed goat made into a rocking chair can be found at this strange little store.