In the land of contradictions - such as Italy is, it should be no surprise that wine heaven is located in a dank little cave. Enoteca Cava Turacciolo is a singular pleasure in a land of beauty. I discovered my favorite champagne OF ALL TIME here (Sorry Andre, champagne of my youth, you've been unseated) - the charming Bellavista.
Start with a wine flight tasting menu, they have a number of different flight options - locals, whites, Italian reds - and you get a wonderful full pour. Don't plan on driving afterwards. Just in case you don't want to find yourself under the table halfway through, plan on ordering the cheese and salumi plate. It is something I will dream about long after the rest of my trip is a vague memory.
The service is delightfully slow-paced, the servers are wonderfull knowledgeable. So, find your own little slice of heaven in a dank Italian cave and plan on enjoying yourself - you won't have much of a choice.