A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

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

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

The only place for a truly presidential dram.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

100 years later, they're still down there.

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

Once America's tallest structure, now a Baltimore landmark.

Before Nixon, "watergate" meant canals.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

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

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A much-maligned monument to teetotalism.

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

A small poultry graveyard in the courtyard of a popular Key West watering hole.

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

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

"We Seceded Where Others Failed."

Go take a picture with the inventor of the daguerreotype photographic process.

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