In which a local geological marvel becomes a quaint roadside attraction.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Once America's tallest structure, now a Baltimore landmark.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Look closely and you’ll notice that the color changes a third of the way up the tower.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Home to items never before seen by the public.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

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

This pun was simply waiting to come to life, and one defense contractor made it so.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

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

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

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

One of the only memorials dedicated to journalists who died in combat.