On a trip to Craters of the Moon National Monument & Preserve in Arco, Idaho we explored a lava tube cave. This present day cave served as a conduit for lava 2000 years ago; cooled lava rock (basalt) forms the walls, ceiling, and floor of the cave. The footage was shot with GoPro cameras carried by students; one camera was on a chest mount and the other a head mount.
GoPro In The Field 