Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

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

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

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

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

Home to items never before seen by the public.

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

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

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

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

The United States Capitol's former columns still stand.

Hot springs monkey spa in the middle of Hell's Valley.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

If Hello Kitty were Mickey Mouse, this would be Disneyland.

A rare festival blending religion, blacksmiths, vagina dentata, sex workers, and the straight-up facts of life.

For hundreds of years, participants in this Japanese festival have been making babies cry to ward off demons.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

A 20-meter (65-foot) robot towers over Tokyo Bay.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

Unlikely place for krautrock legends to hang out.