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

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

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

A fine, large-aperture telescope available for public use.

Site of the greatest known waterfall that ever existed.

Nuclear reactor created the plutonium used on Nagasaki.

A short hike into the mountainside forest reveals a decaying 1890s town.

This large artificial waterfall in Washington state was merely an incidental byproduct of a technological megaproject.

A sun-filled museum featuring an ever-rotating collection of classic and exotic cars.

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

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

This Seattle store is packed with all sorts of curious creatures and creations.

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

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Drive up a paved road into "Nevada's Yosemite" for exquisite views and mountain hiking in an alpine setting.

As fallout from an irrigation project, a formerly cottonwood-lined stream is now a sandy, desolate, post-apocalyptic channel lined with weathered stumps and tumbleweeds.

This giant slab of driftwood marks the beginning of the Winnemucca to the Sea Highway.