The photograph above is taken from the spot where the cache is hidden. Once you find the spot where the photograph was taken from, the image will inform you as to the hiding place (this will make sense when you're there).
The container is hidden behind and in the lip at the bottom. Its smaller than the standard micro but still not a nano. The paper is waterproof so your pen choice should reflect this.
The cache is located in a potentially high muggle area depending on the timing of your visit. Please dont compromise the cache.