High on the western edge of Zacatecas state and declared a national park in 2000, the isolated Sierra de Órganos makes for a fun visit. The region is named for its distinctive rock formations, some of which resemble organ pipes; others are named for their similarity to the likes of ET, Christ and Los Frailes. Keen campers or hikers may enjoy staying in one of several campsites , or you can contact the municipal tourist office in Sombrerete to rent a cabaña . There are also several picnic areas but no other facilities and no year-round water source. The park is relatively small (11 sq km) and makes a fascinating visit for a couple of days, but beware: there are no maps available, nor designated trails; even experienced hikers require compasses. Be sure to wear a hat and carry food and water.