Some of the images were drawn over scratch marks made by the extinct giant bear, and bear bones are scattered around the cave. (newscientist.com)
The movie then proceeds to be a smattering of sketches where Hercules, incredibly muscular but with no social skills in the slightest, makes a nuisance of himself, getting into fights with sailors who apparently disrespect him, taking on giant bears in the zoo and becoming a professional weight - lifter. (oracleoffilm.com)
It might be possible to study the similar, if less spectacular, buttes in the vicinity of Devils Tower, however, which likely formed in the same way — with or without the help of giant bears. (scientificamerican.com)