After perhaps 100 yards the tunnel got higher and I could stand up. Looking back again is Lucy and a side tunnel that goes only about 30 feet. Perhaps they went that way and then decided it was the wrong direction and abandoned it. Here the tunnel is through solid lava rock.
There is "light at the end of the tunnel". I'd say the whole tunnels is about 200 yards long with the last 100 yard having a height of 6 feet.
