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

Two geologically young and nearly circular volcanic subsidence craters, each about a half-mile in diameter, abruptly break the nearly featureless Snake River Plain.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

A lava tube cooled to form this long tunnel that stays chilly even at the height of summer.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Home to the deepest rift anywhere on Earth.

An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

Some 46,000 years ago, a volcanic eruption led to a flooding event that carved this short canyon with steep vertical walls.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.