Las Cruces sits in the Mesilla Valley of southern New Mexico, with the Organ Mountains rising sharply to the east and the Rio Grande running through farmland to the west. New Mexico State University anchors the city with research, agriculture, and cultural programs, while Old Mesilla, just southwest of downtown, preserves a historic plaza, adobe buildings, and a church that recalls frontier days. The desert light here gives evenings a particular color that photographers and painters notice right away.