How often do you imagine seeing shapes in the clouds? How about seeing shapes in rocks? I recall many a hike where I imagined seeing something in the rocks, as if something was watching me. Adding mist to the equation adds even more mystery. But even in clear weather you can imagine seeing something. Can you see the elephants on Table Mountain?
Disclaimer: this cache is on top of Table Mountain and as such you need to take all the necessary safety/hiking precautions.