Ideas??

My boyfriend has completely spoiled me all weekend and goes back to work tomorrow, I want to do something nice for him. He won't be home until around 9, though. I want to take a walk somewhere with him somewhere but I want more than just a walk. I want to maybe surprise him with something. I don't know, I'm not good with this stuff! Lol. I'd like the keep it on the suttel side, but more than a simple walk or a drive. It'd be too late for a picnic, so I'm out of ideas. 🙁 I know it needs to be something outdoors even if it's night time, he's been wanting to be outside more. So any ideas are appreciated!