There was this one cache that me and a friend did, this was the first one that we ever had to use the hint for, we looked for about a hour in this park, there was a bench in the area and nothing else but woods.
we also forgot to log how big the cache was for this one so we were pretty much shooting in the dark, but we were presistant, we evently called my brother to go online and look up the hint for the cache, when he got back to us he told me that the hint was magnetic, I was stuned because we looked the bench over quite well and it was the only magnetic thing within half a mile, when we inspected the bench further we relized that one post on the left side had a extra nut bolt than all the rest.
we gave a tug on the odd ball and sure enough it came off, unscrewed and a very small peice of paper in side.
it was one of those lights that you could buy at the dollar store no bigger than a 3/8 nut bolt
