proper, 18 small villages, 71 residential developments and two rural housing developments. Together, these localities cover an extension of 149.86km2. The municipality is located in the Valley of Mexico, just northeast of Mexico City and northwest of Mexico State capital of Toluca. The municipality borders the municipalities of Atizapan de Zaragoza, Tlalnepantla de Baz, Jilotzingo, Huixquilucan de Degollado, Xonacatlán and Lerma with the Mexico City Federal District to the east and southeast. The highest peaks are the Organo and La Malinche mountains at above sea level. Other notable elevations include la Cantera, El Cedral, San Joselito, La Plantación and Peña del Rayo. The main rivers through the area include the Totolina, San Lorenzo and Los Remedios. Water supply for the municipality is supplemented by 28 deep wells, and an aqueduct that brings water from the Lerma River. It has a temperate climate with a rainy season in the summer and early fall. Freezing temperatures occur between November and February, but the last significant snowfall occurred in 1967. Vegetation outside the city proper consists of conifers and oaks, with orchards of fruit trees such as plums, apples and pears. Most wildlife consists of small mammals such as squirrels and opossums along with small reptiles and birds. However, deforestation is a major problem. There are eight ejidos, five of which are dedicated to agriculture and the rest to other activities. Agricultural production includes animal feed, barley, beans, corn, wheat, avocados, peaches and cactus fruit. Livestock includes cattle, pigs, sheep and domestic fowl. There is also some trout farming. Building stone, sand and gravel are still mined here. However, the overwhelming majority of the municipality's economic activity is the industry and commerce in the city proper. The major un-urbanized area of the municipality is the Los Remedios National Park, located in the far west. This park was established by decrees in 1938 by the federal government with an area of 400 hectares. Within its borders is the Sanctuary of the Virgin of Los Remedios, a colonial era aqueduct and a pre-Hispanic archeological zone with a Chichimeca temple. All of these are located in and around the mountain called Cerro Moctezuma. The site was an Aztec observatory and is also believed to be where Cortés and his men rested after fleeing Tenochtitlan. The aqueduct is long and consists of fifty arches which measure high and extend into the ground. The first stage was built