Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

This forlorn park is the result of a failed investment turned tax dodge.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

Astonishing collection of helmets, scientific instruments, and medical models.

A whimsical monument deep in this park commemorates the groups that helped build it.

Home of Philip Johnson, one of the 20th century's most influential architects.

American artist J. Alden Weir purchased this 60-acre estate for $10 and a painting.

The only remaining piece of hull of the most decorated US ship of WWII is this giant name plate.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The first pet cemetery in the United States.

What appears to be an act of fruit vandalism is actually a cultural statement.

This derelict building used to house infirm Freemasons, their widows, and orphans.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

The real-life site of Ichabod Crane's infamous gourd attack.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

Glacial erratic or man-made dolmen? It probably wasn't druids.

Adherence to strict Jewish laws is required to enter this ultra-conservative New York village.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.