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

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

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

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

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

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

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

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.

A nostalgic bibliographic gem.

A super-sized promotional trick that is now a D.C. landmark.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

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

Apartment building was once posh playground to the Hollywood elite.

Legendary frontman of the Doors looms in this giant mural by famed Venice muralist, Rip Cronk.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

A man-made island in scenic San Francisco Bay.

Concrete strongholds stand guard over the Golden Gate.