When I was visiting Nottinghamshire, I didn’t just go to Sherwood Forest. I also went to Nottingham (do not recommend) and Clumber Park (recommend!)
Clumber Park is a beautiful estate that was once the seat of the Duke’s of Newcastle. The mansion’s no longer there, but all the surrounding buildings still stand. If you’re not done walking yet after seeing Sherwood Forest, get in the car and drive to Clumber Park (part of the National Trust). It’s only fifteen minutes from Sherwood Forest and has a completely different atmosphere.
There’s a huge lake, a church, an adventure playground, a cafe, a discovery centre and a lot of trees to climb in. Perfect for a day out with the kids (that I didn’t have with me)!