tree grows over collapsed lava cave

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tree grows over collapsed lava cave

Collapsed lava tube cave.­

Ancient lava flows in the Shasta-Trinity National Forest (California).­

basalt
cave mouth
caving
lava beds
lava cave
lava tube cave
natural cave
rock formation
shasta-trinity national forest
spelunking
stone
tree
volcanic
August 18, 2015
Medicine Lake Road, California, USA

Lava beds and geothermal features in the Pacific North-West.­