Discovered by a soldier during the Revolutionary War, these springs helped create an iconic South Carolina ginger ale.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

Extraordinary objects lurk in this quintessential regional museum.

Where pardoned turkeys once spent their all-too-brief final days.

A museum dedicated exclusively to aircraft used in the military.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

The U.S. Fish Commission’s effort to mass produce carp.

The only tennis court that falls under the jurisdiction of the central bank.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

Obscure Freemasons still live in D.C.’s largest private residence.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The walls of the iconic dome are hollow and have a secret stairway.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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

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

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

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

Two dozen pinball games hidden away inside a most unlikely location.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

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