This is without a doubt one of the most fantastic places I have ever visited. Viña Tondonia is a hundred-year-old wine cellar located in Haro. It has something magical inside, especially if you discover it in company of the future heir, who tells you about the history of her family and her passion for wine.
You can walk through the huge wine cellars, visit such an incredible place like the wine cemetery or taste one of the wines with an aperitif, but there is also a lot more you can do there. During the weekend it is open to the public, and I swear you should not miss out on it.
Inside, what fascinated me the most was the wine cemetery. It is a place where they preserve the best and oldest bottles.