A rotating cast of guys and dolls in front of a Washington, D.C. building.

The national park was once a plantation estate.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

A much-maligned monument to teetotalism.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

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

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

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

A line of blue paint marks the route of the inaugural parade.

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

Before Nixon, "watergate" meant canals.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A derelict bit of transportation infrastructure hidden in the woods.

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

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

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

An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.