Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

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

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

The most decorated dog of World War I is preserved in the Smithsonian.

This taxidermy horse was a Civil War hero.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

This grand gothic brewery has been pumping out suds for over a hundred years.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Discover the taste of mold.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Visit a sweet shop selling one of the first candies ever made and sold in America.

A museum dedicated exclusively to the lore and history of ouija boards.

A collection of full-size movie monsters opened to the public.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.