A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

A world-class collection of mechanical musical instruments and automata.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Step inside Lucy, the world's largest "elephant."

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

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

Hidden beneath a washing machine in a fake kibbutz, this secret bullet factory has been preserved as a museum.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

This haunting monument honors the victims of 9/11.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

Washington's iconic carousel has a nice piece of Civil Rights history.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Ghost Town in the Demilitarized Zone of the Golan Heights.

A grave surprise in the downtown area of New England's second-largest city.

This supermarket is suspended 25 feet above an interstate highway.

A comic book store got the road by its shop officially renamed after Superman's girlfriend.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Home to items never before seen by the public.