The Mesa Gold, seen atop the hub, is where customers go to chill after their visits. From Discover Westworld:
"We have designed the world's finest decompression chamber: the Mesa Gold. At the conclusion of your stay, begin the process of dipping your toe back into the real world: swap adventure stories with other guests, drink award-winning cocktails, experience food prepared by world-renowned chefs, burn off adrenaline at professional-grade athletic complexes."
Viewers have wondered whether the Westworld grounds and the mesa hub exist within the same physical world. This second map (considering the Mesa Gold, specifically) might indicate they do. If so, where the heck is this mesa hub on Discover Westworld's map? It seems like it would most likely be nestled somewhere in the canyons, between the Old Territories and the ranch land. But it's still not entirely clear how patrons, robots, and workers get to and from the park.
Internet sleuths wonder if the Delos diagram could also represent the maze The Man in Black seeks. Is the maze not meant for patrons like him -- as Lawrence's daughter says -- because it's designed mostly for staffers? Is Harris' character nodding to the base's structure when, in Episode 2, he says, "There's always another level"? (A couple other popular theories contend that the puzzle is elsewhere, or that it's a Turing test for the hosts.)