Mt. Lassen Part II

20,000 years ago the earth cracked open in a north eastern section of what is now known as California and a river of molten lava flowed out for sixteen miles. As the lava flowed, the outer part cooled and hardened while the inner part remained fluid and continued to flow. When all was said and done, what remained was one of the world's largest known lava tubes.



( You know you want to go down in this cave )