The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

D.C. once had its own tiny rival to the New York Stock Exchange.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

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

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

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

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

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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

The United States Capitol's former columns still stand.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

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

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

This poor little statue is the most vandalized memorial in Washington.