Since it opened in 2000, this Guinness-themed attraction at St. James’ Gate Brewery has welcomed more than four million visitors—many of them, presumably, very thirsty. The storehouse has been called the world’s largest pint glass, because its seven floors surround a pint glass-shaped atrium. Visitors start at the “bottom” of the glass—the first floor– and progress to the top. Along the way, they learn the story behind the brews, sample flavors, learn how to pour and serve, stop in a private Connoisseur Bar for a tasting experience, and, when they arrive at the seventh floor, “drink” in panoramic views of the city.Don’t miss: The St. Patrick’s Day festival held here each year. Check the website for a schedule of the multi-day festival.