9. Thunder caves of rock art
In 2014 a study was begun that discovered a link between some cave art and its location.
If a scene depicts a herd of animals charging, the art is often found in caves where it gets very noisy with echoes.
In some North American caves, the walls are adorned with Thunderbirds; these caves are very noisy with echo, and it was believed that the beating of a Thunderbird’s wings caused thunder.
Upon investigation, remainders of artwork have been found even in caves where rock art had never been found before; probably done there because of the acoustics in those caves.
In the Canadian Shield, there is a myth about rock spirits and sounds that clearly link the idea that cave art is to be found in specially-selected caves known for their sound quality.