When I was in Prague in September, a Czech friend of mine introduced me to a type of wine that is called "burchak" in Czech. It's only available in September because it's made from the first crush of grapes. The grapes are basically still fermenting as you drink it so it tastes a little bit like grape soda - it's all bubbly and really tasty! It doesn't have as much alcohol as regular wine and you can actually buy it on the street and walk around with it, sipping it from a plastic cup. It's really neat!