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

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

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

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

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

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

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

The only undammed section of the Columbia River in the United States has been preserved, ironically, by its proximity to the Hanford Nuclear Reservation.

Nuclear reactor created the plutonium used on Nagasaki.

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

Site of a tragedy on the Oregon Trail.

A narrow fjord-like lake, the third-deepest in the United States, runs for over 50 miles into the Cascades of Washington state.

The illuminated falls are a gem in North Cascades National Park.

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

This historic Victorian hotel has a scandalous history of affairs and murder.

This historic bridge connects Whidbey Island to Fidalgo Island across whirlpool-filled waters.

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

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.

Bits and pieces from the ill-fated Donner Party's winter cabins.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

The flow from this waterfall sometimes comes out of springs below its rim.

A large lava tube that can be walked through with no special equipment.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A vertically floating hemlock controls the waves and weather at Crater Lake.