That appears to be a pretty comprehensive list but it's missing Northern Michigan's Mystery Spot: https://www.atlasobscura.com/places/st-ignace-mystery-spot ht

That appears to be a pretty comprehensive list but it's missing Northern Michigan's Mystery Spot: https://www.atlasobscura.com/places/st-ignace-mystery-spot https://www.atlasobscura.com/places/st-ignace-mystery-spot Went there as a little kid. Most folks touring were a bit scared by it. I viewed it as a magic trick and wanted to figure out how they did it.