The privately owned cemetery that holds room for Washington's finest when they step down from life.

A super-sized promotional trick that is now a D.C. landmark.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The house where John Wilkes Booth conspired with his co-conspirators.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

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

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

One of the only memorials dedicated to journalists who died in combat.

A Civil War Museum with some notable medical antiques.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

The trials and tribulations of marking Poe's grave.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The maritime museum that boasts the largest nautical library in the western hemisphere.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

The oddly shaped, steam-spewing building is now an art studio and gallery.