alairecomyn's User Profile - Atlas Obscura
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Frederick, Maryland

One-Million-Liter Test Sphere

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

Chapman State Park

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.
Havre de Grace, Maryland

Havre de Grace Decoy Museum

The Decoy Capital of the World.
Accokeek, Maryland

Marshall Hall

The ruins of an 18th-century mansion that was once named "Mistake" by the man who had it built.
Annapolis, Maryland

U.S.S. Agerholm Model

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.
Baltimore, Maryland

Grove of Remembrance

This grove was planted more than a century ago by the War Mothers of World War I.
Knoxville, Maryland

The Sign Above the Tunnel

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

Union Arch Bridge

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

Blue Blazes Whiskey Still

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.
Fort Washington, Maryland

Woodrow Wilson Bridge

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.
Gaithersburg, Maryland

World's Largest Deadweight Machine

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

Congressional Country Club

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.
Germantown, Maryland

Ruins of Clopper Mill

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.
Chevy Chase, Maryland

Woodend Sanctuary & Mansion

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

Into the Woods

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

Naval Surface Warfare Center

This massive swimming pool is the high tech home to the human-powered submarine races.
Greenbelt, Maryland

Greenbelt Historic District

A relic of FDR's brief foray into utopian urban planning.
Cockeysville, Maryland

Beaver Dam

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.
Cockeysville, Maryland

System Source Computer Museum

Its diverse collection of computers and technology spans the ages.
Woolford, Maryland

Old Trinity Church

The United States' oldest Episcopal church still in active use.
Ocean City, Maryland

1912 Herschell-Spillman Carousel

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.
Waldorf, Maryland

Dr. Samuel Mudd House Museum

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

First Public Gas Street Lamp in America

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

Roscoe the Rooster

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