Bordeaux

Bordeaux. Home to the most famous (and most expensive wines) in the world.
While Merlot is the predominant grape throughout the whole Bordeaux region, Cabernet Sauvignon reigns supreme in Haut Medoc/Medoc.
While the famous Chateaux (Cos d'Estournal, Lynch Bages, Margaux, Leoville Barton etc) get the media attention, there is real value throughout the region, no matter what your price point.