I loved the experience to go to Lyme's art gallery. I learnt a lot about abstract art and the sculptures in it. Please come here if you enjoy art and like to be envolved within the art community.
I will say however to only go here if you are a tourist or if you've got nothing to do around town because it isn't exactly the biggest thing in the world. But on the other hand, you don't have to pay to get in and the workers there are really nice to you.
If you love it so much, you can even buy some of the pieces! Most of them are paintings and some of them are printings on cards and canvases (And don't forget the glass sculptures- they are beautiful) . They make good gifts to send to someone or just a souvenir for your trip to Lyme.
The gallery is in a really pretty courtyard in the middle of the Mill complex. It shows work by local artists. Exhibitions change every month or so and most of the work is really affordable. I found some great cards there and bought some prints as presents/souvenirs. The people in the gallery are very friendly and just want to encourage you to take a look and enjoy the artwork. Strongly recommend. The website has information about what's on and you can get more details in the various artiists who show there.