Today at 3 p.m. -- in about 30 minutes -- Guinness Open Gate Brewery & Barrel House will open its doors in Relay, Maryland, which is located in Baltimore County. 

Though their "test taproom" has been open since October — and already boasts a devoted following of local regulars, in addition to tourists — it pales in comparison to the expansive, three-level brewery experience that also resides on the same property, which is owned by Guinness' parent company, Diageo.

Ten days ago, I sat down with Oliver Gray & Ryan Wagner of Guinness to talk about the opening, the history of the site, the beer, and much, much more.