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

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

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

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

This grand gothic brewery has been pumping out suds for over a hundred years.

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

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

The first museum in the U.S. to address human rights issues in China.

Also known as the Founding Church of Scientology.

A public art jibe at one of the United States’ oldest and longest-serving senators.

The oldest house in Washington, D.C. wasn't originally constructed in the nation's capital.

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

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

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

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

Surrounded by a verdant garden and a backdrop of ivy, a monument to beloved poet Khalil Gibran stands outside of the Lebanese embassy.

When it comes to handsignals (and colonialism) rock always beats scissors.

The most accurate timepiece in the world.

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

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

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

A clone of a cloned tree that was so important it allegedly had its own guards.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

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