Definitely worth a day trip out of town, the Guachimontones pyramids are about an hour west of Guadalajara. A major site of the Teuchitlan tradition, a complex society that existed from as early as 300 BCE until perhaps 900 CE, is dominated by circular stepped pyramids in the middle of circular building complexes. This site may have even older origins as the Aztecs erected a city on a hill called Huachimontón, just north of Guachimontones.