As depicted on a construction wall mural. You can see a SkyWatch tower in this mural (three in three days!). You can even see the construction wall in this mural. In fact, you can see this mural in this mural! (It's the one all the way to the right, next to the dog-and-cat panel.) The artist cut off the right side of the mural-within-the-mural, however, eliminating the need to paint an infinite regress. Check it all out on Street View.
UPDATE: This mural is even cooler than I thought!