Amazingly, this old machine within the Resorts Casino still functions.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

There aren't too many operational funiculars around, but Pittsburgh has two!

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The "lovely red Vega" of the legendary record-settling pilot.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

It is against the law to obstruct the view from the top of this English burial mound.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

Once forgotten, this strip of sand was a rare beachside haven for Black Americans in Atlantic City.

The world's oldest bookshop still in operation.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

A fountain standing as a testament to a doomed alliance.