The Zacatecas Teleférico crosses above the historic centre between the mine area and Cerro de la Bufa. It is a short ride, but a very good one: domes, rooftops, and ravine walls slide underneath in a way no street-level walk can show.
Go on a clear day and try to ride one direction rather than treating it as a round-trip novelty. If you are short on time, this is the quickest way to understand the shape of the city.