An educational beer festival will remind visitors that beers are made of barley, hops, polka-activated fairy dust, and a secret ingredient known only to Jimmy Carter. Celebrate the delicious concoction with today’s Groupon: for $30, you get one ticket to the Great World Beer Festival (a $67.62 value), held at Center 548 in Chelsea. While the event is held over three sessions on October 1 and October 2, this Groupon is only valid for admission to the session on Saturday, October 2, from noon to 4 p.m.

Billed as "the United Nations of Beer," the eighth-annual Great World Beer Festival (a.k.a. Brewtopia) showcases brews from around the world, allowing barley buffs to taste to their liver's content without need for a translator. With your ticket, you'll get a souvenir tasting glass, plus unlimited sampling of brews from more than 50 domestic and international breweries. Lap up the taste-bud-reviving ales and stouts of California's Stone Brewing Co., or sip on the irresistible elixirs from Vermont's Magic Hat. Lederhosen-wearing lion tamers can crack the whip at Bavarian Weissbier from Hofbräu München, and Asian-beer buffs can try China's Yanjing Beer. Along the way, food vendors, such as Helmut's Bratwurst and Pretzels and Phil's Philly Steak Sandwiches, will pair tasty brews with equally flavorful eats.

Brewtopia is held in the 35,000-square-foot Center 548, so you'll drink brews while gazing at scenic views of the Chelsea arts district, the High Line, and the Hudson River's plethora of ghosts of 17th-century explorers. And with musical entertainment all afternoon long, you can celebrate finding the perfect beer by air-guitaring along with Beethoven’s “99 Bottles of Beer on the Wall.”

Must be at least 21 years old to attend.