A copper still where fermented blue agave mash is turned into tequila at the Casa Siete Leguas, El Centenario tequila distillery in Atotonilco de Alto, Jalisco, Mexico. After being crushed by a stone mill the agave fibers are mixed with spring water and fermented before being distilled into tequila. The Seven Leagues tequila distillery is one of the oldest family owned distilleries and produces handcrafted tequila using traditional methods.