This can be a very busy spot! When I placed the cache, there were a couple hundred people around, including at least two brides and two grooms. But finding it should not be too difficult, if you can find a seat. (That was a hint.)
You are looking for a small camouflaged tube, the size of a match holder.
PLEASE REPLACE THE CACHE WHERE YOU FOUND IT!
Since I want people to find my caches and don't like seeing DNFs, please feel free to check the hint.