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

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.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

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

The tunnel under the Capitol Building where Congress takes out its trash.

A memorial to a shareholder activist feared by CEOs around the United States.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

A replica of the famous memorial statue at the Normandy American Cemetery hides in an office building in downtown D.C.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

A secret greenspace hides atop a Capitol parking garage.

D.C. once had its own tiny rival to the New York Stock Exchange.

This taxidermy horse was a Civil War hero.

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

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

Through the decades, Black music stars have performed at this historic hub for music and the arts.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

A portal into the bricked up canal that runs through the heart of Washington D.C.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The first memorial dedicated solely to the Black troops who fought for the Union.