Did you know of this “sport” I never heard of it until I stumbled upon this imgur album. Basically, people attach a strong magnet to a rope and throw it into rivers and bodies of water hoping to find sunken treasure, or murder weapons, or un-exploded ordinance. In reality, all they seem to find is rusted crap, but hey, they’re cleaning up the environment, so good on them.
The sport is pretty dull, the commentary on the photos is what makes it fun. I can’t say the same for the rest of the subreddit dedicated to this sport, but there are some interesting finds in there.