In the Casa de la Cultura on the south side of Parque Centro América, the Museum of Natural History is interesting mainly for its neoclassical flourishes. Inside are some examples of pre-Columbian pottery. Your ticket also includes admission to the so-called Museo de la Marimba, which, despite its name, has little to do with marimbas, and is more a hodgepodge collection of Quetzaltenango artifacts. It's a must only if you're a true aficionado of regional history.
7 Calle and 11 Av., Quetzaltenango, 09001, Guatemala