A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Natural rock water slides hidden in the remote forests of northern Idaho.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

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

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

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

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

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

People come from across the globe to swim in this lake believed to have healing properties.

Site of the greatest known waterfall that ever existed.

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

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

North America's first Indigenous-owned winery is located within Canada's only desert-like ecosystem.

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

This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.

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

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A hiking area billed as a possible home to Bigfoot.

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

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

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

The second tallest railway trestle bridge in America.

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