So you’re going to want to click on the map. It will take you to the source site, where you’ll find a lot of other Humboldt Maps (I grew up in Rio Dell and that’s why I picked this one). I always heard that Wildwood became Rio Dell, but it looks like they were two separate towns in 1921 and must have merged later.
As a reminder, once you click on an image you’ll go to a page with the image and a miniture version of it in a box on the left. Adjust the zoom, then drag that little red box around on the mini-image to change the main image focus area. Oh yes, and have fun.