The site of the Wellington avalanche, one of the America's worst railroad disasters.

The highest point in Washington state is a volcano covered in glaciers.

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

What's that on the side of that building? Va Va Voom, it's Bettie!

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

The longest and widest floating bridge in the world.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The eccentric mansion of one the most popular horror authors of modern times.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

An emporium for the weird, creepy, rare, and just plain gross.

Shoreline strewn with the remains of ghostly fallen trees.

Stroll through a wonderland of stupendous moss-covered trees.

These ancient sacred grounds granted amnesty to those who managed to reach them.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This black shoreline is made up of exploded lava particles.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

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

A wall of chewing gum moonlights as collective art.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A museum dedicated to the history and exploration of both popular music and science fiction.

Old submarine parts have been converted into faux whale fins.