Guinness is an Irish dry stout that originated in the brewery of Arthur Guinness at St. James's Gate, Dublin. It is one of the most iconic beers in Dublin and is known for its dark color, creamy head, and rich, roasted flavor. The brewing process involves using roasted barley, which gives Guinness its distinctive taste. It is often enjoyed in pubs across Dublin, where locals and tourists alike gather to savor its unique flavor and enjoy the lively atmosphere.