At this research institute, the chile is king.

A prison-like structure guards the remains of a notorious Old West outlaw.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

When life gives you Prohibition, open a bar in Juárez.

The only place for a truly presidential dram.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

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

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

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 street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

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

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

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

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

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

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

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

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

Home to items never before seen by the public.

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

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.