This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

The narrowest house in America is seven feet of pure spite.

Two dozen pinball games hidden away inside a most unlikely location.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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

The last remaining location of a drive-up hot dog stand named after a local pool shark.

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

The revival of a classic Art Deco theater.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A historic neighborhood church is reborn as a psychedelic arts collective.

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

Home to a vast and influential collection of Shakespeareana.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

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.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Washington's iconic carousel has a nice piece of Civil Rights history.

It was once the base for a series of domestic terror attacks.

A historic arena where the Beatles played their first concert in the U.S.

The only Leonardo Da Vinci painting in the Western Hemisphere.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.