Yes, an underwater winery exists.
Take a trip to Croatia's Pelješac peninsula, where you can dive into the Adriatic to find wine stored in a shipwreck.
From May 2017, Edivo Wine will be offering diving trips to its underwater cellar where wine created for the Navis Mysterium brand is aged. The vineyard is located at Drače, on the Pelješac peninsula, about an hour's drive from Dubrovnik. Edivo makes its wine from plavac mali, a Croatian red grape, which is used in the well-known wines from Pelješac and from the very chic island of Hvar.
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The owners of Edivo Wine were inspired by the practice in Ancient Greece of storing wine under the sea in amphorae (clay jars with two handles). They pour the young wine into a traditional glass bottle, which is in turn placed in an amphora. After a three-month period on terra firma, the amphorae are plunged into the darkness of the Adriatic Sea at a depth of 18-25m for one to two years.
Anyone taking the diving trip will be able to see the amphorae stored in the wreck of an old ship. The visit will continue above water with a tasting session. The wine can also be purchased as a souvenir.
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The benefits of the sea. The French are also familiar with the idea of ageing wine in the sea. In 2007, Emmanuel Poirmeur, the maker of Egiategia wine, on the Basque coast, filed a patent for the vinification and ageing of wines underwater. He now ages his wine at a depth of 15 meters in the Atlantic, in Saint-Jean-de-Luz Bay. Sea conditions enhance the fermentation process, resulting in a more aromatic wine.
And in 2010, a group of divers found a 170-year-old cargo of champagne at the bottom of the Baltic Sea. Experts said that it was still very drinkable, proving that the sea is an ideal place to age wine as it provides both darkness and a constant temperature.