Sancerre is located right in the middle of the Upper Loire in Western France, an area known as "Château country". It's neighbour, by just 16km, is the appellation of Pouilly-Fumé, known for sauvignon blanc based white wines that although from the same grape, are completely different.
The Loire river runs right by the village of Sancerre keeping temperatures low and cool which is ideal for the grape variety and allowing these wines stand out from their counterparts in Bordeaux.
If you are a lover of tart, light-bodied, aromatic white wines then Sancerre is the place to look. My mouth is watering at the thought!
To be honest, the appellation of Sancere is a manufactured beast with row upon row of neatly mechanically harvested vines spewing out this sappy, palate sharpening grape variety BUT they work. Mostly, in part, down to the soil which gives a flinty minerality to the wine and offers a dryness unrivaled in the tart, aromatic sauvignon blanc world.
A true Sauvignon Blanc, Sancerre offers zesty citrus, lime and grapefruit, gooseberry, green apple and pear fruit and herbaceousness that can range from thyme to chamomile to grass depending on where it's grown and seasonal weather. Some Sancerre is oaked which adds an additional dimension such as straw and bready brioche.
Put all that together with sappy dryness and you've got a pretty versatile wine.