One of the Treasury Building's original columns now sits as a garden monument in the middle of a busy military base.

Come for the springs; stay for the mud bath.

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

The world's oldest soul food restaurant is also one of its best.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

A small and somewhat hidden memorial to 68 local veterans of the Vietnam War.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

George Washington once stopped by this house for dinner.

Home to two notable early-20th-century Black educators, Lucy Slowe and Mary Burrill.

One of the first Second Empire-style buildings constructed in North America.

The former home of the woman who successfully fought to integrate restaurants in Washington, D.C.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

The former home of Lillian Evans Tibbs and her grandson, Thurlow Evans Tibbs Jr., whose prodigious contributions to music and art spanned more than 90 years.

In this cemetery stands the country's first public crematorium.

The first of Lancaster's "rural cemeteries."

The oldest farmer's market in America is so ancient it was approved by the King of England.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

An outlandish shoe shaped house built by an eccentric millionaire.

This Georgian-style house built in 1746 is the oldest surviving structure in Bladensburg.