It’s currently reminiscent of the ruins of the Colosseum in Rome. But when the Chicago Cubs’ new spring training stadium and surrounding amenities are complete, there’s little doubt it will be among Mesa’s main attractions.

It's a Saturday afternoon, and a multitude of fans – 25,000 total throughout a day defined by a peek-a-boo sun – meander underneath Chase Field's retractable roof for the annual D-Backs annual FanFest. The day is a prelude to the upcoming season – an opportunity for the Diamondback faithful to snag a few autographs, take a few cuts against a wiffleball-lobbing Wade Miley and, most importantly, bask in the glow of the lovely optimism that comes before the realities of a 162-game season commence.