A view inside a lava tube near McCloud, California, most likely formed from an ancient eruption of Mt. Shasta.  The cave begins at a collapse pit with two ways to go.  This is the downstream route which has ceilings up to 30 feet high & a mixture of breakdown & original passage w/ some occasional unique sand castle formations.  Here you can look at the floor as see some unique solidified liquid lava wall glaze over the aa floor that appears to have ruptured from the side of the walls, something I've never seen before in lava tubes.  This cave reminds me of Arnold Ice Cave near Bend, Oregon, however instead of being freezing & dry it is not as cold (somewhat foggy) w/ plenty of water drips making an eerie sound all throughout.  The cave does eventually end over 1,000 feet in as the ceiling drops down to the floor.  The tall breakdown pile opposite direction of my silhouette is the exit.  These caves have been known as ice caves since before 1935.