Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

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

There’s a special club house at the top for the bell ringers.

A historic arena where the Beatles played their first concert in the U.S.

Art deco landmark on the outskirts of Washington, D.C.

A much-maligned monument to teetotalism.

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

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The span is crooked and made from two older recycled bridges.

Where the U.S. government kept its actual treasure, before Fort Knox.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

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

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

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

Home to a vast and influential collection of Shakespeareana.

Decades before the scandal, this staircase on the river was a literal "water gate."