GISfag here for all your faggy GIS needs. Was looking at Ketron island, couldnt see shit from aerial photography with all the trees in the way so lets just go delete them. Got some lidar data from https://lidarportal.dnr.wa.gov. There was about 22,000,000 points with a spacing of about 1.5m so the elevation model is accurate to about 2m. Looks like there is 13 substantial buildings and other smaller buildings in the north/northwest, probably sheds ect, except one section in the northwest that looks like sides of pyramids or something like that, and a smaller pyramid next to it. Could just be inaccurate data. Supposedly only 17 (kek) people live on the island, thats alot of buildings for that many people, could be holiday houses if we wanna play skeptics. A few other things stuck out.
Will post a few more photos.