is common in Mexico but there is a local variation on roofing which is a vault with a ridgeline in two styles. Constructions dating from before the 1950s are now considered to be “rustic.” These are mostly found in the historic center of Tequisquiapan and a number of the oldest communities in the municipality. New constructions tend to imitate this style. The main highway for the municipal is Federal Highway 120, which connects it south to San Juan del Río and north to the Sierra Gorda region of Querétaro into Xilitla in San Luis Potosí. Other important roads include State Highway 200 which connects it with Galeras, Huichapan and the city of Querétaro, and State Highway 126, connecting it to Tecozautla. Almost all of the municipality's roads are paved with only 2.3% left as dirt or paved with stone. There are also roads that connect the eighteen communities of the municipalities as well as to the state of Hidalgo. La Trinidad has an archeological site. The site was excavated in 2009 and 2010 and dates from 750 to 900 CE., around the time of the fall of Teotihuacan. It has been proposed to make it an ecotourism site called Dö Mëkuni. In addition to conserving the areas flora and fauna, it proposes to offer activities such as rappelling, zip-lines, rock climbing, fishing and more, along with a museum dedicated to the archeological site. The municipality sponsors the annual Rally de Tequisquiapan, which is affiliated with the PAC auto championships. The rally begins in the town and winds its way along the highways of Querétaro in the mountain areas of the state. History The name comes from Nahuatl and means “place of tequesquite (potassium nitrate)” a type of natural salt used to flavor food since pre Hispanic times. The municipality's seal was adopted in 1989 at a contest held in conjunction with the annual Feria Nacional del Queso y el Vino. This seal contains elements related to the area such as the sun, grapes, the Tequisquiapan River and the parish church of Santa María de la Asunción. The presence of humans in the modern state of Querétaro is estimated at between 1500 and 2500 BCE, with the oldest human remains found at a cave in the San Nicolás community. This site gives no indication that these early humans had either agriculture or pottery. Much later human remains in the same cave