Interior Pictures 2 Tivoli-Union Brewery (Milwaukee Brewery), Denver Colorado Tweet From here grain goes to the top of the tower from rail cars down below. From here grain flows by gravity through different processes ending up as beer in the basement. Top of tower. Grain proceeds from here through gravity fashion. Grinder: Second machine in grain procession from top of building. This is the floor beneath the top of the tower that the grain drops through. Grinder Hot water vat and detail...showing roof structure and rear of tower building.