Without a doubt, I'd turn the money in. No if's, and's, or but's about it.
If I found that kind of money (or, for that fact, any money), I would absolutely turn it in. For one, it is not mine. I did not earn it and it was not given to me. Therefore, I lay no stake of claim in it. Secondly, if I were to keep it, I would not be able to live with myself. I think I was born with a guilty conscience. I don't know why, but, even when something is not my fault, I feel guilty and take on that shame. So, to actually do something...well, I don't think I'd be able to last more than 24 hours -- the guilt would eat me up.
Now, don't get me wrong, I'm not perfect. The thought would enter my mind about all that I'd be able to accomplish with that kind of money. And, it would take a lot of stress off of a lot of people I love and care about. I'd have a moment's thought about paying off my bills, fixing up my house, and having money to spend without consequence. But, those thoughts would be short lived and easily replaced with the wonder and curiosity of whose money I had just found. And, I'd worry about what the consequence for them would be if I were to keep it.
It's easy to think about free money. But, the fact is, nothing in life is free. If I were to lose that kind of money, how would I feel about losing it? What would it be like for me if someone came across my money and kept it instead of returning it?
I recently found $57.00 lying on the floor at work. I was off of my shift and the money was actually sitting right outside of our door. It was off premises and I couldn't figure whose it could be. I was amazed no one had walked by (it was outside on the sidewalk) and picked it up. It could have been anyone's. The thought came into my mind that I could really use the money -- after all, I had missed work due to illness and had an exorbitant bill at the pharmacy. Money was tight. But, I knew it was not mine. And, maybe that was the last few bucks left to the person who lost it. Who knows if they were sick, on disability, or had a large bill at the pharmacy as well. So, I put it in an envelope, brought it inside, and kept it for 24 hours to see if the owner came in to claim it. Lo and behold, we got a call the next day from someone asking if money had been found. They were able to correctly identify the bills and I had them come right in to pick it up. It turned out to be an older woman's grocery money. And, for being kind enough to hold on to it and not run with it, she bought me coffee. To me, that sweet gesture and her gratitude was worth more to me than 10x that amount of money.
I'm no saint. And, I'm not perfect. But, I'm too honest to ever keep something that isn't mine. So, that money would be turned in. Even if I was on my last cent, I'd turn it in. Why? Because, in my opinion, it's the right thing to do.
. I would do some good with that money in the name of cat rescue and feral organizations. And a nice vacation would be nice. Dream on 
