The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

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

A computer bug so primitive it was an actual insect.

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.”

The former home of the woman who successfully fought to integrate restaurants in Washington, D.C.

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

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

The only tennis court that falls under the jurisdiction of the central bank.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

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

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

Mysterious installations bring levity and light to a sometimes stodgy city.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These abandoned waterworks are crumbling into the Potomac River.

This small cemetery remains hidden behind a recreation center.

These unusual rooms on wheels are holdovers from the 1960s.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

This former Cold War missile control site played an important role in the creation of GPS.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."