lava tube cave

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.

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

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