The unbelievably opulent home built for an infamous newspaperman.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This massive redwood tree has a hole in the base big enough to drive through.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

This working class sculpture pounds his hammer all the livelong day.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

This bridge provides safe passage for squirrels.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

An extraordinary mixture of natural beauty and man-made phenomena.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A giant Troll lurks under one of Seattle's oldest bridges.

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

The wooden airship was the largest flying boat ever built.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

The largest wooden building in the world now houses a fascinating collection of aircraft.

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.

A Roman-style column in Oregon hides a spiral staircase inside.