CedarR's safe story reminds me of another one of my finds.
I was fishing the beach below the old Tacoma Narrows Bridge. This was before the new park was put in south of the bridge and the new bridge hadn't been built yet. You had to hike down the hill under the bridge to get to the beach. I got there just as it was getting light. As soon got down the hill, I saw a pretty good size safe lying on the beach. There were a bunch of papers, checks etc in the water and on the beach as well. Based on how it was lying, it must have been tossed off the bridge and hadn't been there very long.
I gathered everything up that I could find and hide it in the woods until I was done fishing. After I was done fishing, I lugged it back up the hill. I noticed that some of the papers referenced a hotel near my house. I swung by on my way home and sure enough, it had been burgarized the night before. I gave the owner back the safe and contents. He said he wanted to reward me and that he'd be right back. I said no thanks, but he insisted. He came back and gave me my reward.... a can of diet coke, lol.