We were driving between Dolores Hidalgo and Pinal de Amoles, but it's a four hour drive on some twisty curvy roads, so I would rather break that into two days.
While perusing the map of our route, I spotted the Arroyo Seco Archeological site. Reviews said it was interesting, so we stopped in and paid the 65 pesos ($4.60 CAD, $3.25 USD) per person entrance fee for the guided tour.