The easternmost town in Alaska can only be accessed from Canada.

The natural hot spring that was integral to the creation of Canada's first national park.

The ruins of the "20-year town" lay out among the mountains of Alberta.

Few other hotels can rival the grandeur of the Castle in the Rockies.

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

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

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

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

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

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

Mile-long cave system near Great Smoky Mountains.

Moonbows over Kentucky.

An abandoned town is hidden in Great Smoky Mountains National Park.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.

The century-old remains of an abandoned farm town in eastern Washington.

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

A graveyard for early settlers, sometimes called Old Pioneer Cemetery, hidden in the woods on a hillside.

An early 20th-century fruit warehouse home of an artistic and cultural renaissance in northeastern Washington.

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

Its 27 graveyards represent the many nationalities and ethnic groups that voyaged to this wilderness in the late 19th century.