I like them geezers who go into the bottom of rivers in places like New York, and always seem to find really interesting things on the bottom. There was one where they found (and definitely didn't plant) a complete 1965 Ford Mustang.
I saw one where they went looking for the revolver that Dutch Schultz threw in the river after murdering a rival in the 1930's...and there it was in 3 feet of water ...one yard from the bank ...and in perfect nick too!!