That’s Washington University’s Brookings Hall in the background in Panel One.
As a side note, this is the first page I’ve ever pencilled entirely digitally on my new Cintiq 21UX. It was an interesting experience, as it didn’t go any quicker than doing it on paper, but the end results were definitely tighter. Strangely, I still inked the page by hand by lightly printing (less than 10% gray) out the pencils out onto my usual vellum bristol board using my large format photo printer. Inking went very, very fast since there was no last-minute tweaks to make. Likewise, the digital touchup and toning went quite fast as well.
I don’t plan on going all digital for PS, but I’ll definitely be working out new workflow patterns to accommodate the new tool. I imagine I’ll be doing much of my paid illustration work entirely digitally from now on.