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

100 massive sculptures in the Hudson River Valley.

This Frank Lloyd Wright summer house was designed along Lake Erie as a retreat for a client's wife.

A natural gas leak provides a flickering flame beneath a waterfall.

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

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

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

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

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.

The first pet cemetery in the United States.

This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

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

A beautiful, historic location open to the public.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Self-sufficient greenhouse floating on the Hudson River.