A hidden alley in urban Baltimore is a haven for graffiti artists.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

This museum is dedicated to the first coast-to-coast highway.

Antiques and recycled art surround this cabin designed to resemble a 19th-century schoolhouse.

One of the first commercially successful anthracite-powered iron-making operations in North America.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

A museum and research center dedicated to preserving the history of Rolls-Royce and Bentley motorcars.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

The scarce remains of a sunken ship peek out from the sand on East Beach.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

This statue intended for children to enjoy became a minor political spat.

This clock tower is all that remains of Bird Hall, constructed by one of the founding families of this Massachusetts town.

Some big-name visitors have patronized this small-town library named for an oil man's daughter.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

A miniature golf course crafted inside the world's largest simulated cave.