Gaithersburg, Maryland
Gaithersburg Latitude Observatory
Tiny observatory made big contributions to the study of the Earth's motion.
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Gaithersburg, Maryland
Tiny observatory made big contributions to the study of the Earth's motion.
Gaithersburg, Maryland
The U.S. government built the million-pound stack of steel during the Space Race.
Gaithersburg, Maryland
Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.
Rockville, Maryland
The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.
McLean, Virginia
A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.
Bethesda, Maryland
Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.
Lorton, Virginia
This field of concrete was once an active defense site armed with nuclear warheads.
Stafford, Virginia
The FBI's urban training course may have the highest fake crime rate in the world.
Richmond, Virginia
This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.
Richmond, Virginia
A small Richmond island dotted with the remnants of hundreds of years of history.
Richmond, Virginia
A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.
Richmond, Virginia
This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.
Petersburg, Virginia
A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.
Williamsburg, Virginia
Giant busts of 42 U.S. presidents sit, crumbling in a field in Virginia.
Delmar, Maryland
The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.
Berlin, Maryland
Explore the legends surrounding these mythical sea creatures inside this museum.
Berlin, Maryland
The land is home to swimming ponies and a legendary 18th-century treasure.
Landenberg, Pennsylvania
The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.
Landenberg, Pennsylvania
The first marker along the famous boundary.
North East, Maryland
The longest-covered bridge in the state of Maryland.
Darlington, Maryland
Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.
Baltimore, Maryland
A miniature city within a city, complete with traffic signs, signals, and streets to teach Baltimore's youth traffic safety laws.
Baltimore, Maryland
This free, take-a-book shop seems like a trick but isn't.
Baltimore, Maryland
This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.