I had some inspiration lately to design a Call of Cthulhu campaign. Part of the inspiration came with taking a quick shot at making a map so I figured I'd share since it came out pretty cool.
I piggybacked a lot on the same techniques used to create our most recent Free Map so it didn't take nearly as long as it would have. The map is meant to show various points where investigators have identified Mythos activity. As one might expect, the largest concentration appears in "Lovecraft Country" which is real life Essex Country Mass. That is where the bulk of Lovecraft's fictional towns such as Arkham and Innsmouth are said to be.