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

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Home of the only civilian casualty at the Battle of Gettysburg.

A diorama of the Civil War, fought by cats.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A Civil War Museum with some notable medical antiques.

This four-story steel sphere in Maryland was used to test biological weapons.

An amazing example of Federal-period architecture, truly unique to this region of the state.

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

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

This candy-striped tower is the farthest east you can go in the United States.

A Circus legend leaves an unexpected endowment.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

A building so large that it has its own weather.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.