so my sister ,herfriend,my brother,my girl friend and me went to satans tunnel last year.we got the a little bit before sun set and waited for dark.we heard some noises like rocks falling,footsteps and some other noises,we coudnt figure it ouy till we were walking to the car.when i noticed all the noise were coming from the creekand ithink all the sounds from the woods had something to with it to .the creek sounds alot differnt in the tunnle.so i dont no if this can explian some of the noises,but its just a thought
kodi