Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

This neo-Gothic former auto showroom is one of the few remaining reminders of Brooklyn's "Automobile Row."

An 1883 schoolhouse now home to collective of artists.

A yoga studio and venue for "chill-out parties" in a former chicken slaughterhouse.

The childhood home of one of America's greatest unsung troubadours still stands in a much changed Brooklyn neighborhood.

This glamorous old building is said to have inspired the Tower of Terror.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

A prohibition era watering hole for the police.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

“Invented in Key West, Perfected in Brooklyn."

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Dozens of feral felines rule a segment of Hollywood's only graveyard.