Find all locations on a particular route using solely visual prompts, first and most correct team wins.
Walk route and take pictures of many different things along the route. Print off sheet and split into two teams, they have an hour to complete route and find all the clues.
If your camera has Location service available you will then be able to use the longitude/latitude from the photographs and incorporate into the groups then having to map their route accurately.
number each picture. Provide a map of the area to be walked. Scouts mark the map with the number that corresponds to the picture.