For most Kiwis, Marlborough is all about one of our well known wine growing regions. And, yes, to can have a great time just exploring the many vineyards in the area. Most of them offer wine tasting, and you can buy direct from the cellar.
But, don't leave out exploring all the little bays around Queen Charlotte Sound, just north of Picton. These are some of the most stunningly beautiful little bays that you'll find anywhere.
Further south you can find rugged beaches, rivers and lakes. And, off in the distance the peaks of the Southern Alps.