The cache is larger than a film canister, but can only house a log book.
Due to winter tidal surges flooding the parking lot, this cache is not at ground level.
Once you find the cache, I'd advise you to take it back to your car to sign the log, that way muggles won't get suspicious of what you're doing. Remember, this cache will test your geo muggle skills and patience, especially in the summer.
Upon returning the cache to its proper location, make sure you place the cache in a horizontal position. The cache should not be found "hanging or swinging."