Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

This homestead was occupied by Union soldiers, who believed the owners were signaling Confederate forces.

The last of nine massive kilns that produced many of the red bricks for buildings in Washington, D.C. and northern Virginia in the early 20th century.

This field of concrete was once an active defense site armed with nuclear warheads.

A weathered, American Foursquare-style house originally built for lumber merchant William Wimsatt.

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

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

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This one-room schoolhouse played a significant role in the education of Black children for almost 100 years.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

This church is known as "The Home Church of George Washington and George Mason."

The former home of the man whose radical ideas changed the nation.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

One of the oldest standing structures in Montgomery County, Maryland.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

These massive concrete balls were used to mine gold in Virginia.

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

The "Sultan of Swat" once attended a school at the site of this baseball field.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Legend says this sacred tree was a gift from goddess Athena.