The national park was once a plantation estate.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

America's first federal monument.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

"...I guess that was your accomplice in the wood chipper?"

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

This elaborate towering structure was once famed for its revolutionary height.

The former hotel where Tesla invented the radio.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

This free, take-a-book shop seems like a trick but isn't.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.