Throughout the year, while deep in our search for the best "underground" spots in the Valley for this year's Best of Phoenix, we started an underground collection.
We dove into the cartography archives at the Phoenix Library, noted a few theme-park-guide inspirations, and found a local, underground illustrator, David Quan, who was up for the job (and game to paint a mural on our building).
After talking to local historians and archaeologists, and digging a few tunnels of our own, we learned Phoenix may be on a grid but its underground is on a very different scale.
So if you're ready to dig deep, check out our interactive, underground map -- you won't need a GPS or a shovel, but you should keep an eye out for the glowing icons (they're where the treasure hunt begins).