A tribute to the pop culture icon overlooks this Washington D.C. intersection.

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

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

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

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

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

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

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

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

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

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

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

The first memorial dedicated solely to the Black troops who fought for the Union.

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

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Obscure Freemasons still live in D.C.’s largest private residence.

Also known as the Founding Church of Scientology.

A brass and marble scale model of the solar system embedded in the concrete.

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

A surprising, but overlooked example of geology in the middle of the nation’s capital.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

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

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