These are quite the stories for sure.

I have a couple, not really too exciting though
The first one was when I was a kid. I just had got a snorkel set and was using it for the first time. Anyways, I was underwater in the swimming section when I saw a fiver underwater. Surpringly enough, it wasn't moving too much under the water. Upon further looking, there was also about 10 dollars in change, loonies etc next to it. Needless to say the snorkel set just paid for itself the first day.

Another time I was walking around the building where I used to work a couple of years ago. It was next to a bar, so one can imagine what all gets dropped at closing time etc. It was a windy fall day, the leaves and other garbage were flying around when something caught my eye. It looked like money, so I caught up to it and found it was a ten dollar bill.