I had to read up on it, we'd have to do a pic scavenger hunt
the idea is, you're given a list and you have to go find the things on the list
since there's just the 2 of us, I'd make your list and you'd make mine
We'd need to have a Treasure Hunt thread to run it from, and use pictures that are already in the selected threads, not add new ones. Treasure Hunts are quite popular in Totnes and direct people to find specific sights, buildings, signs etc... and write down what the clues point to and where they found them (e.g. a clue along the lines of "are the eggs there high?" would be the crockery chicken on the roof in South Street).