lava tube cave

lava tube cave, basalt, caving, galleries, lava beds national monument, lave cave, natural cave, spelunking, tunnels, volcanic

Lava tube cave in the Lava Beds National Monument (California).­

This one was called "Catacombs", and there was a sign indicating that it was closed due to "possibly unsafe conditions".­ I think that they are just afraid that visitors could get lost, since this lava tube has a maze of branches and is rather large.­

For more info about lava tubes, read en.­wikipedia.­org/­wiki/­Lava_­tube.

For more info about this place, read en.­wikipedia.­org/­wiki/­Lava_­Beds_­National_­Monument.

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Volcanic Areas of the Pacific North-West