Let's look at a fairly mainstream list:
Chardonnay, Merlot, Cabernet Sauvignon, Pinot Noir, Syrah/Shiraz, Malbec, Riesling, Sauvignon Blanc, Zinfandel, Gewurztraminer. Fairly common, right? Now, let's look at regions... Have you ever had a Chateaunuef du Pape wine? If so, you could have tried up to 18 different varietals right there in one glass! (That's how many types of grapes are allowed to be used in the production of CDP. It used to be 13 officially, but in 2009 that was changed to 18, citing that white and rose` versions of the grapes are completely different.) So, you could possibly add these red varieties: Cinsaut, Counoise, Grenache Noir, Mourvèdre, Muscardin, Piquepoul Noir, Syrah, Terret Noir, and Vaccarèse (Brun Argenté). White and pink varieties are Bourboulenc, Clairette Blanche, Clairette Rose, Grenache Blanc, Grenache Gris, Picardan, Piquepoul Blanc, Piquepoul Gris, and Roussanne. What about a White Bordeaux? That'd be Semillon and Sauvignon Blanc.