This first release in the “Plans ’n’ Places” series sets a high standard that I hope other installments will follow. The title describes the setting perfectly, but doesn't quite communicate the scope of the scene, which measures 1500' x 1500'! But you don't just get a map of this area; you also get the ability to overlay that map with 30' squares or hexes and/or elevation lines. In addition, 3rd Supplement provides four very nice elevation-view drawings of scenes within the larger scene, and two pages of log or notebook entries suggesting various plot hooks. Overall, a very useful supplement, and largely (with the exception of some of the notebook entries) genre-neutral. Sometimes the hyperlinks and interactive features don’t quite behave as expected; I was dumped back to the cover page several times when I thought clicks would generate other behaviors.