If you are one of the 20 million visitors who have already experienced the Guinness Storehouse tour, it’s time to return for the new Behind the Gates tour to become a Guinness Completist.

Arthur Guinness may not be the patron saint of Ireland (that would be St. Patrick) but he might as well be the patron saint of Irish tourism. In a country filled with incredible sights and natural attractions, the Guinness Brewery is Ireland’s number one sight, now drawing nearly 2 million visitors a year and 20 million visitors since it first opened its doors in 2000. Arthur famously signed a 9,000-year lease back in 1759, so he believed—hard—in the potential of his brand, but with sights like the Cliffs of Moher, the Giant’s Causeway, the Rock of Cashel, and the Book of Kells, how is a brewery Ireland’s number one attraction? What is it about “the black stuff” that draws visitors from far and wide? Why does Guinness hold such a special, green-white-and gold place in our hearts and bellies? And are there leprechauns involved behind the scenes? Oh, and what’s this about the Camino de Santiago connection?

Now that the Guinness Brewery has unveiled a cool new Behind The Gates tour, Guinness fans can visit the oldest parts of the brewery, get a better understanding of Guinness’ place in Dublin and the world, and get to the bottom of Ireland’s most famous export…all the while, getting to the bottom of a few pint glasses, too. Sláinte!