A walk through the historic city center, under the streets of Seattle.

Sasqu(w)atch out!

As a show of peace, a Japanese naval pilot gifted his 400-year-old Samurai sword to the Oregon town he bombed.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

These colossal desert barcodes have been fine-tuning spy satellites for decades.

The first attack on the continental U.S. during WWII occurred off the coast of a quiet California golf course.

The remnants of a failed socialist commune can still be found just off a California highway.

Inspiring Earthlings to Boldly Go.

Where NASA's satellites and rovers phone home.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Russian history in San Francisco.

Abandoned anti-ballistic missile base.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

Abandoned Air Force base that has fallen into disrepair.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Where the line between entertainment and aerospace blurs.

The rusting remains of the largest assembled WWII fleet on the West Coast.

The final resting place of a space program monolith.

The last of its kind in the country.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The rocks in this arid basin leave trails of movement behind them.

Home of the International Space Hall of Fame.