This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Thomas Edison's home and final resting place also boasts an impressive garage, where some of the earliest electric cars are on display.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

The site of one of history's most indelible and horrific tragedies.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Penn State's giant bug collection.

The first American department store, and home to the largest operating musical instrument in the world.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Pittsburgh's literal underground railroad.

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

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

The first of Lancaster's "rural cemeteries."

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The final resting place of the Hollywood star who came to a tragic end.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.