One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

This elaborate towering structure was once famed for its revolutionary height.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

Rare recess caves fill this unbelievably beautiful Ohio park.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

Dr Barnes' $25 billion private collection of art and arboretum.

Yo, Adrian!

The world’s first penitentiary, meant to be humane, drove men insane.

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

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

One of Philadelphia's largest murals resides hidden under this bridge.

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

Alexander Hamilton’s creation caused quite a bit of controversy.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

Population: 1.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

A bizarre house filled with an astounding array of collections.

Elaborate hand-carved wooden clocks two brothers made in their spare time are on display at this handsome little museum.

The tunnel that runs beneath this former inn was once a hiding place for enslaved people seeking freedom.

The first declared National Monument in the United States.