The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

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

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

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

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

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

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

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

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

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

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

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

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Ship skeletons haunt Baltimore's waterways.