Steganography (a technique for hiding information by using images) was first introduced to Bay Area geocachers in The Big Picture by fizzymagic. Although there is a steganographic message hidden in these pictures, it is unnecessary to use steganographic decryption to find the cache.
The cache difficulty rating is arbitrary. The cache should be easy to find once you figure out where it is. There is no pen or pencil in the cache; so remember to bring one. There are a couple of small items for traders.
The "152" sign in Photo 3 is no longer there. Sorry, I don't have a replacement image yet.