The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The home of aviation trailblazers, in a remote corner of the big city.

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

Site of the first pathological and bacteriological research facility in the United States.

One of only two commuter aerial tramways in the United States.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A 19th-century shrine covered with prosthetic body parts as votive offerings.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

The state's oldest continuously operating museum houses more than 5,000 Civil War artifacts.

Prehistoric animals decorate this popular outdoor park.

A Beaux-Arts triumph set to become Ford's innovation campus

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

A quaint miniatures museum that turns its focus towards the lives of Americans in a simpler time.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The museum moved on, but the diorama remain.