This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

After serving in Vietnam, Korea, and even a stint in the Turkish navy, the unique ship is now open as a museum.

Former headquarters of the KGB.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A bit of retro transportation flair preserved in the world's largest department store.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Snack on a partially gestated duck egg.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

A historic town sits upon the site of a long-lost 18th-century trading community.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

Yo, Adrian!

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

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