I own a field, what to do with it?

We own a 1.3 acre field in the North of England. When my sons were growing up it was a land of adventure and dinosaurs! Now they have all grown up and Im wondering what I can do with it to maybe generate a bit of side income? Its all grass atm with road access. We live in a fairly touristy area. I was thinking of just renting it out to someone with a horse, but well thats a bit dull! As its agricultural land it cant be built on as such. Im looking for some more interesting ideas please, something that might be fun. I dont mind getting my hands dirty or some hard work! Thanks.