Scarily observant Gazette readers Katie Hilburn, Gregg Ulvestad, Jon Wheeler, and Mark Springer correctly identified the final aerial photo in the series as the area around Hogan Park in Midland. The small body of water directly beneath the "fish" (which is a pond at Hogan Park Golf Course) is part of the wonderful nature preserve maintained by the Sibley Nature Center.
Sadly, we've come to the end of the series. It was a good excuse for me to not to have to do any actual blogging. But I've been very impressed with your perceptiveness and with the number of responses (we had a dozen different people submit correct guesses, and more than that participated). Thanks for making this a pretty darned fun project!