The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

The smallest covered bridge in Maryland.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

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

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

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

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

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This one-room cabin where the young colonel slept during the French and Indian War.

The whole world in one water tank.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

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

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.