The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

A computer bug so primitive it was an actual insect.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

The "lovely red Vega" of the legendary record-settling pilot.

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

Art deco landmark on the outskirts of Washington, D.C.

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

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

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

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

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

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

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.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

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

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

The most decorated dog of World War I is preserved in the Smithsonian.

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

A haunting tribute to pioneering photographer Clover Adams.