Undeveloped lava tube near Bend — bring your own flashlight, no fee, real adventure feel.
Undeveloped lava tube in the Newberry volcanic system — about 1,800 feet you can walk through. No guide, no fee, no railings. Bring two flashlights per person; if your batteries die, you're in pitch black.
Crooked River Ranch RV Park puts you within a short drive of Smith Rock, Bend, Sisters, and the Deschutes — all 59 things on our list.