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

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

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

This historic lighthouse was well known for the large number of women who served as its keeper.

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

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

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

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

This tower was once used to create ammunition for early settlers.

These eerie outliers of the lightning bug family glow a mysterious blue color.

A natural spring situated on the grounds of the Hawthorne estate.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

Little has changed in the way that this mill operates since the 18th-century.

An amazing example of Federal-period architecture, truly unique to this region of the state.

This striking Victorian Home with its 113-foot turret is best known as the site where abolitionist John Brown was executed in 1859.

The Cadillac Ranch for monster truck aficionados.

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

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

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

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.