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.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

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

A historic cemetery filled with quirky faux wood art and unique tombstones.

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

The world's oldest continuously operating airport was founded by the Wright Brothers.

Wedged between two sets of row houses is an awkwardly located family graveyard.

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

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

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

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

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.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

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

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