You will be looking for a small black container. Me and a friend had been making all sorts of geocaches and we had like 50 so we were trying to hide some. We got there and found a good spot and we remember making a cache that would have fit perfectly in, but we couldn't find it (we actually had all 50 some caches stuffed in our backpacks). We found a different spot and hid it there and got the coords and about 3 seconds after we got the coords and wrote them down the gps died. You can park nearby but be carefull and use stealth because there are lots of muggles around.