This was another teen program I did. I created a list of items the teens needed to take pictures of and set up some basic rules for the program - no driving from place to place, no stepping on other people's property, no causing a ruckus in stores or businesses. Teens had a set amount of time in which to take the pictures, and points were deducted from their group for every minute they were late returning to the library.
Our teens love being with their friends, taking pictures with their phones, and running around town, so this was the perfect combination of those ideas. I will definitely do this program or something similar next summer.