Crusoe Treasure

The world's first underwater winery, Crusoe Treasure, ages its vintages 20m below the surface on an artificial reef. Tastings of its whites and reds are available on land at its tasting room. For a truly immersive experience, take a scenic boat ride out to the reef, where barnacle-encrusted bottles are hauled up for you to taste. Swimming off the boat is possible; prices also include pintxos.