An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

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

A much-maligned monument to teetotalism.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A wondrous old library overlooking the nation's capital.

A building shaped like the Army Corps of Engineers logo, because why not?

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

A derelict bit of transportation infrastructure hidden in the woods.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Extraordinary objects lurk in this quintessential regional museum.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

Rowdy rebels fortified this home during the first popular uprising in United States history.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

A genuine Tudor manor transported piece by piece from England.

The maritime museum that boasts the largest nautical library in the western hemisphere.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

This museum explores the grim reality of life in the earliest British colonies in America.