The holiday has done been rung in and Santa is hanging out in Martinique with Mrs. Claus and it's time to saddle up the old Squarespace and get back to work. In the coming weeks I'll be photographing some of our southern lakes, but today it's time for urban reflection. Tucson isn't known for its Dubai-like skyline, but for hundreds of years the Southwest boasted the largest and tallest prehistoric buildings in North America; Casa Grande was one of them. Today's photo is a more recent example, and--spoiler hint--it is located downtown. Find out exactly where, tomorrow.