She stares out across six lanes of traffic, clutching a musket and infant with determination.

The smallest covered bridge in Maryland.

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

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

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

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

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

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

FDR's Art Deco hospital tower was hopelessly inefficient.

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

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

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

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

A Civil War Museum with some notable medical antiques.

Brain collection and database that narrows the gap between man and animal.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The U.S. government built the million-pound stack of steel during the Space Race.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

One of the largest collections of Catalan literature and cultural materials outside of Spain, created by a community of 1960s expats.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

One of the last schoolhouses constructed in the early 20th-century still standing in Montgomery County.