The headquarters of the famous Yale society.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

Final resting place of Typhoid Mary.

The loneliest island in New York.

This Bronx apartment building is officially recognized as the birthplace of hip-hop.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

The famous author's cottage hideaway.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

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

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

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

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

An enormous, inside-out glass globe built in 1935.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

A beautiful Victorian-era cemetery, complete with a miniature village.

The homestead of American patriot John Adams.

This small shop walked so America could run on Dunkin'.

Hut with supplies for shipwreck survivors.