I haven't got the foggiest idea what this is about, so like a good anthropologist, I must surmise it has a religious purpose. 🤔

I haven't got the foggiest idea what this is about, so like a good anthropologist, I must surmise it has a religious purpose. 🤔

This could be the Teenage Mutant Ninja Turtles' hideout outside the sewers, haha!
It does look kind of playful, so maybe it's for kids to hang out and check out the wildlife in the stream below.