Best track to visit next year-advice please!

Hi- going to try and visit 2-3 races next year-Im in the UK.
Went to Catalunya a few years ago and really enjoyed it!
What I liked was the fact we had a great grandstand seat but could also leave our seats and wonder around the track and watch from other spots on the grass banks as well!
I do fancy Portimão but have been told your stuck in your seat and not allowed to go walkabout!
What tracks would you suggest I should visit next? not flyaway's so Europe only for next year!
Thanks!

I’ve been to Valencia, Mugello and Misano. Thoroughly enjoyed all of them. Mugello had the best views and freedom around the track, so I would recommend that as the best of the three. Stunningly beautiful scenery and an amazing circuit.