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

This nine-story building is the oldest standing skyscraper in D.C.

This unassuming passageway played a key role in one of the most important events in U.S. history.

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

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

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

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

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

A much-maligned monument to teetotalism.

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

The most accurate timepiece in the world.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A terrific purveyor of natural history objects and curios.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.