As Voll says there is a good animal sanctuary called hillside in west Runton. Sheringham is a good base as it is near Holt, Cromer, Wells etc. I would say best to stick to the coast as there’s loads of nice villages along there. Can see the seals at Blakeney too. From Brancaster all the way to Cromer there is plenty to see and do and loads of nice beaches etc.