Visit the massive mansion known as Larnach Castle in Dunedin, complete with renowned gardens.
Once back at the train station in Dunedin, board a bus for a scenic ride up the hills to Larnach Castle (not really a castle, more like a mansion) - short tour thru the mansion and beautiful grounds. You can take the narrow stairs (you must be mobile) up to the overlook and see even more around Larnach Castle. Very interesting history of the family who built it. Note: There is no free time if you see both sights (train and castle) to do exploring/shopping.
Provider: Princess Cruises
Excellent with good commentary from the lady driving the bus
Provider: Independent Operator