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

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

More than 700 species live within this murky marvel of a swamp on California's coast.

Only hotel where you can legally launder money.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Commonly referred to as the most photographed Victorian home in the United States.

Canyon walls shrouded in ferns.

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

Not far from Mount Rainer, an iron wonderland claims the landscape.

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

This unique library spans a mighty river.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Traditional 15th century Chinese garden in the middle of Vancouver.

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

This natural marble cave is one of only five national monuments in Oregon.

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

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

10,000 flowered plants bloom in the City of Roses.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.