Five short lava tubes inside the city limits of Redmond, in a BLM recreation area a few minutes from the airport, used for shelter by Native people and later by travellers on the road. They are small, free, unlit and ideal for a first cave with kids old enough to scramble, with none of the commitment of the big tubes. PUBLIC (BLM), Redmond, Oregon.
Oregon
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Other places on the map within a couple of hours.