Albuquerque is the largest city in the state of New Mexico. It is the county seat of Bernalillo County and is situated in the central part of the state, straddling the Rio Grande. Albuquerque is home to the University of New Mexico (UNM) and Kirtland Air Force Base as well as the Sandia National Laboratories and Petroglyph National Monument. The Sandia Mountains run along the eastern side of Albuquerque, and the Rio Grande flows through the city, north to south. The city was founded in 1706 as the Spanish colonial outpost of Ranchos de Alburquerque; present-day Albuquerque retains much of the Spanish cultural and historical heritage. Albuquerque was a farming community and strategically located military outpost along the Camino Real. The town of Alburquerque was built in the traditional Spanish village pattern: a central plaza surrounded by government buildings, homes, and a church. This central plaza area has been preserved and is open to the public as a museum, cultural area, and center of commerce.