One of the last active volcanoes on the Eastern seaboard.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

On the side of a Virginia highway, a collection of monuments commemorates an 18th-century trek through the Blue Ridge Mountains.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This Virginia town has been famous for its fried chicken since the 19th century.

This old-fashioned carhop restaurant gave the world the waffle cone.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

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

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

One of the oldest standing structures in Montgomery County, Maryland.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

The local community brought back this land to transform it into a nature preserve.

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

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

An eerie, decaying ghost town destined to fade into the forest.