Weird cache containers in General geocaching topics Posted January 26, 2011 We have a night cache here deep in the woods. you go to a set of three reflectors and turn on your track log on your gps. Then you follow the trail of reflectors. when your at the end your gps draws out the next step of the multi you have to complete. As far as regular caches go. There is an ammo can in a very crowded part of town. when you open it a loud alarm goes off directing everyones attention to you. Kind of scary but fun for those who know its there.