This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

An Irish Memorial commemorating those who perished due to potato blight.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This sculpture of a fisherman spent six years at the bottom of the Schuylkill River.

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

A daily replay of the experiment that proved the rotation of the Earth.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Elevated freight railway turned wildly successful urban park.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

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.

A very classy 1920s-era bar right in Grand Central Station.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

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

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Mysterious rocks that ring musically when struck.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Visitors come from all over to bring gifts and tokens to the grave of Alice, who is thought to have died of a broken heart.

Breathtaking and huge 430 year old maps of Italy.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.