I have 16 acres, how can I make money?

I have almost 16 acres of land that is mostly hillside and mostly wooded. I wonder if there's a way to use the land to make money legally. I'm not going to grow pot or anything like that. I don't think there are enough trees to timber it. It's 1 mile from a main road and I don't know that there would be any need to put a cell tower there. I don't know how to go about finding out that information either. We bought the land with the intention of building a house and moving there but that hasn't worked out. We tried to sell the land but it didn't sell. I'm debating whether to try selling again or to keep it. Any suggestions for a legal way to use the land to make money?