Overlooking Puget Sound sits a garden with a Buddhist prayer wheel and an elaborate labyrinth.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

A volcanic landmark located on an Ice age lake bed.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.

A volcanic fissure over two miles long and up to 70 feet deep.

A chance to sleep among the firs and pines of the Oregon forest.

Massive crater in central Oregon.

100-year-old shipwreck you can walk up to at low tide.

Treehouse motel and treehouse-building school.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The second tallest railway trestle bridge in America.

The remains of a former logging boom town, crumbled away in the forest.

The crumbling remains of a gold mine that was operational in the 1930s.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

Gold, silver, copper, lead, and zinc were once extracted at this abandoned mine near Lookout Mountain.

This sci-fi gazebo located in a Washington power town is made from old bits of industrial electrical equipment.

Nuclear reactor created the plutonium used on Nagasaki.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

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

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

Four abandoned towers hidden above the Douglas fir forest in Washington.