This three-story Victorian mansion is now home to the National Park Service’s Historic Preservation Training Center headquarters.

A well-preserved quarry and six of eight continuous burning pot kilns used to make burnt lime and crushed stone are highlights of the self-guided walking tour in Fountain Rock Park.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

The land is home to swimming ponies and a legendary 18th-century treasure.

A unique marker erected during the 18th century.

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

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

This hidden treasure provides a charming access point along the south side of Baker Park.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.