Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

Volunteer-run library dedicated to exploring five decades of activism history.

People escaping slavery may have hidden inside a corpse vault.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

An overlooked tribute to one of the most important peace deals in American history.

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

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

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

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

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

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

The R&B singer's modest church guarantees a religious experience, regardless of your beliefs.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

At this research institute, the chile is king.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This is one really big nut.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.