A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

People escaping slavery may have hidden inside a corpse vault.

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

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

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

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

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

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

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

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

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

Giftshop catering to cryptozoologists and anyone with a sense of humor.

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

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

The towering figures were created from the cemetery's fallen old-growth trees.

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

Largest Roman Catholic church in North America.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.