Hey guys

I found this weird little cave entrance at the base of a rockwall off the interstate road near my home. I pass by it often after giving my brother a ride to work and was always curious. I noticed someone had stacked rocks in the entrance and then one day it looked like there were even figures as well. I finally went to look at it today and the stack was still there, along with a much larger rock sitting at the back, possibly blocking further access. The figures I saw were actually a nativity scene someone left by the stack of rocks. The figure of Joseph had fallen over so I set him back up where I assumed he was originally sitting, just to be nice. What do you guys make of this?