You my friend have just stumbled on a gold mine! Use it wisely! But don't make it a business, at least not yet, I say you dedicate some space to a skatepark for sure, build some home made ramps and stuff for skiing, and put like a house type thing in there. Keep it real low key for now an then it will keep getting better and better once you learn more and then in a while maybe open it as a business. But host sick parties,car shows, pretty much whatever you want! enjoy it for now cause you are one of the luckiest people I have ever seen.
On the other hand though, you could properly equip it to meet the needs of a certain business in the trades or something and rent it out and make some serious money, if that became a welding shop you could probably make like $1500 a month rent from the company, and since it's commercial realty you don't have to look after electricity bills or any of that maintenance stuff or anything.
I gotta be honest with you I am just green with jealous rage right now! Good luck!