The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

A white oak with property rights.

An enormous natural sandstone bridge in Kentucky.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The final resting place of a physician rescued during the bombardment of Fort McHenry.

Both the building and blades of this reconstructed 19th-century windmill can turn in a breeze.

The longest-covered bridge in the state of Maryland.

Once the center of a thriving early Black community called Martinsburg.

This hidden treasure provides a charming access point along the south side of Baker Park.

The elevator hidden in a smokestack on Roosevelt's yacht now serves as a monument to the former president.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This massive swimming pool is the high tech home to the human-powered submarine races.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

Its diverse collection of computers and technology spans the ages.

The United States' oldest Episcopal church still in active use.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

Built by the patriotic residents of Boonsboro in a single day.