This is the American National Park (Subway) System

If the United States' national parks were connected via a 5-line metro system, it would look a little something like this.

Not exactly like this, of course. It is "so incredibly not to scale and also fictional" (in case you weren't sure), according to the folks at the Sierra Club who created the map. Still, it's a nice collision of our obsession with infrastructure porn and the great outdoors.

ht Maptitude