This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The highest bridge in America was built for an almost unnervingly small amount of money.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

This super steep hike ascends 2,000 feet in less than a mile.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The world's largest public collection of PEZ memorabilia.

A human attendant once directed car traffic from this structure before automated stoplights.

Statue commemorating the use of ether in anesthesia.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

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

Decades before the scandal, this staircase on the river was a literal "water gate."

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.