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

The secluded site of a 1943 plane crash and amazing rescue is only accessible by hiking through the woods.

The only Native American museum along the Oregon Trail, run by the peoples who have lived on the land for generations.

A stunning landscape of bunkers that once stored chemical weapons.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

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

Site of the greatest known waterfall that ever existed.

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

A bust of the first president welcomes visitors to the only town in America called George, Washington.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

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

Nuclear reactor created the plutonium used on Nagasaki.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

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

An obscure waterfall that looks like something out of a fantasy novel.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

A town's monument to a touch-football victory 50 years in the making.

A nearly abandoned 19th-century town on the Palouse.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

A black cottonwood gets a second life as a home for books.

A wild west land agreement was etched right onto this historic Idaho stone.

This historic Idaho island is home to a strange timeshare museum, a homemade mini-golf course, and an outhouse named Aunt Fanny.

Protected from the elements, these Native American rock paintings have survived approximately 250 years.

The former home of the "Mother of Father's Day."