Lava River Cave
Scared of the dark? Then be sure to bring your flashlight and Xanax in the mile-long Lava River Cave in the Deschutes National Forest. Formed from a volcanic eruption about 80,000 years ago, this cave allows for self-guided tours in a cold, drippy environment. Though spending an hour and a half walking several feet underground might sound eerie, it’s definitely a unique experience. To explore this cave, you'll need to descend 55 stairs to a combination of flat boardwalk, uneven surfaces, and more stairways. Don’t fret -- all that work isn’t for nothing; once in there, Mother Nature rewards you with a picturesque sand garden and an array of ice crystals.