Yes, we said bats. Metro Phoenix actually has a pretty sizable bat population in the summer; estimates are in the thousands. Many of these little guys hang out during the day in a Maricopa County flood control ditch colloquially known as the Bat Cave. Here's what you do: Before sunset, park near 40th Street and Camelback Road. Walk northwest on the Arizona Canal Trail (it's flat, but not paved) for about a half-mile until you get to the large ditch with a metal fence around it, then position yourself to watch the opening. Next, stay very quiet and wait for sunset, when the bats pour out of the cave in search of their nightly meal. We have to say, it's pretty darn cool.