this photo was near the ruin inner wall at the start of the horizontal runway looking straight up. The light coming in above was from an opening in the cliff face. Shear wall went up to it , it would only be accessible with a tall ladder (20feet maybe) I made a half hearted attempt to access it from the outside, although technically possible coming back down would have been pretty dicey, (a fall might have killed you at worst and at best only a couple of broken legs)