Signs, signs, everywhere there really are signs. And so many places to a hide a micro cache! Signs are metal, so magnets are an obvious choice. The most common place to hide a cache in a sign is at the base of the pole, almost buried in the grass or sand, or up inside where the actual sign attaches to the pole. Another option, which I have yet to personally see, is a magnetic reflector, which slides open to reveal a log. In the picture below, the cache was hanging inside the post itself. I only found it by using my mirror to look inside.
