A historic gristmill that still produces flour and grits the old-fashioned way.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

America's first federal monument.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

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

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Washington's iconic carousel has a nice piece of Civil Rights history.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

This statue of the "father of television" stands prominently in the United States Capitol.

Come for the boats, stay to explore the intriguing assortment of art.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

A nostalgic bibliographic gem.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

A historic neighborhood church is reborn as a psychedelic arts collective.