Wines, like scotch and bourbon whiskey, can be made either from one or more varieties of grapes or grains. Most wines are blended from many species of grapes, both for reasons of taste (to get the...
Go to the wineries!.
Find out which wineries offer complimentary tasting. However, it is a courtesy to buy wine after you have tasted it.
In Napa Valley the wineries typically charge between $10-$20...