That's a nice idea, nac. We don't have a ceety park here, just a town park that closes at sunset! Not much of a veiw either, except for daytime. More birds there though, than in my neighborhood.
Another thing I enjoy looking at are the brick houses on one side of the block. They face the sunset, so they light up at that time, and they are very textured because of the uneven brickwork of the old houses. Nice for checking field of view and focus too.