Trout Museum is definetly worth a look, very educational. Then take a walk along the ponds and feed the fish. Pancakes by the ponds are delicious. There are BBQ facilities and tables should you require them.

Approximate cost: $varies

A gorgeous place to visit, the gardens are magnificent, watching the HUGE fish in the really large ponds is fun-the fish breach like whale when they are being fed.
A big pleasure is being able to sit in the comfort of the pancake parlour munching on lovely pancakes while watching the massive fish in the ponds.
Well worth a visit!

Approximate cost: $7 entry