http://www.vallartarestaurants.com/temp/mac.jpg
I found this in Puerto Vallarta, Mexico. The place where predator 1 was filmed. 2 hours walk in the jungle i found this big rock with a 25cm aprox diameter STAR SHAPED HOLE side to side from the rock (1.2mts!! aprox, i can put my entire arm inside it), the rock will be 1ton aprox. and the output hole should be around 18cm diameter aprox. so is cone shaped too, and also has a spiral twist. I dont think this could be human made, it is in the middle of nothing, and the zone is not an archaeological area, no aztecs, mayas or whatsoever on this side of mexico.
Any help to identify would be apreciate.