If I Had 17 Million Dollars

I was in math class today learning about geometric series. We were working on a problem about winning the lottery, and I think we were supposed to get 17 million dollars a year for 20 years, and we had to figure out the future value of that money. But the problem aside, what would I do if I won 17 million dollars?
I asked my friend Jacob, who was sitting next to me, what he would do, and he said that he would buy a bunch of telescopes and then donate the rest of his money to NASA. He likes space.
So I thought about it for a bit, and I decided that I would travel. I would go to all the places that I want to visit, like Scotland and Wales and Turkey and Greece and Ethiopia and Antarctica and Peru and basically the whole entire world. I'd also probably go to Harry Potter World, or, better yet, just go to the actual Hogwarts and learn magic.
Then, when I come back, I'd go to Scotland and buy a castle and live in the highlands. I just think that Scotland is a beautiful place with all those mountains. So that's where I would live.
In my castle, I'd build my own library (if it didn't already have one) where I would keep all of my books and whenever I'd feel like it, I'd just go and read.
I did go through a couple of minutes in class when I wanted to build myself an underwater castle, but I thought that that might be a little extreme. And anyway, if I had an underwater castle, it would be hard for people to come visit me because they would probably need a SCUBA license to get down there.
So by the time that I've traveled the world, bought myself a castle in the highlands, and built myself my own personal library, I don't think I'd have that much money left. But then, I'd just get 17 million dollars (or 16.04 million dollars in present value assuming 6% interest rate) the next year, so it'd be all good.