Wines are best stored in a cool, dark place in your house. Preferably, the space will have a stable temperature year-round, and not be actively disturbed. Fluctuations in temperature can cause the wine to “breathe” in the bottle, pulling in air from outside the bottle.
Wine is best stored with bottles on their side, to ensure the corks do not dry out. Dry corks can lead to oxidation and spoilage. If the wine is sealed with a rubber cork or screw cap, they can normally be stored upright.