I came across your site and realized you don’t have this one listed. I do not own land near this and am not affiliated with it, but I’ve been there and it was wonderful. Just really positive energy boost from sitting inside for a few minutes. Here is an article that talks about this particular vortex. It’s behind a rock shop (Prospector’s Paradise) near Allouez, in Michigan’s upper peninsula. Just thought it should be included on your site. Thank you! Jen