Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Elevated freight railway turned wildly successful urban park.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

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

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

This lovely pocket park is one of the most under appreciated in D.C.

Home to items never before seen by the public.

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

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

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The school tested mustard gas for the U.S. Army during World War I.

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

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

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

The most accurate timepiece in the world.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

A tiny piece of the Moon is embedded in this stained glass masterpiece.