> A prehistoric structure reminiscent of England’s iconic Stonehenge has been uncovered in Grand Traverse Bay, an arm of Lake Michigan on the western shore of Michigan’s Lower Peninsula.
> ... discovered what appears to be a dry land corridor that once connected northeast Michigan and southern Ontario. Scientists say the main feature, known as Drop 45 Drive Lane, is the most complex hunting structure discovered beneath the Great Lakes to date. The 9,000-year-old limestone structure consists of two parallel lines of stones that lead to a cul-de-sac lined with natural cobblestones. If the findings are correct, the hunting complex would be twice as old as Stonehenge.
Source: https://arkeonews.net/the-mysterious-prehistoric-underwater-...
This is literally the purpose of a stone wall: herding the animals in a specific direction, to a specific location.
> not sure why you would make a wall to hunt them
Because 8500 years ago hunting tools were primitive (stone tips on spears) so stacking the odds in their favour was smart.