Pecos Pueblo, the mission ruins and the Visitors Center are the National Historical Park's main unit, located in western San Miguel County, about 17 miles (27 km) east of Santa Fe and just south of Pecos.
Also known historically as Cicuye, the first Pecos pueblo was one of two dozen rock-and-mud villages built in the valley around AD 1100 in the prehistoric Pueblo II Era. Within 350 years the Pueblo IV Era Pecos village had grown to house more than 2,000 people in its five-storied complex.
The main unit also protects the remains of Mission Nuestra Señora de los Ángeles de Porciúncula de los Pecos, a Spanish mission near the pueblo built in the early 17th century. A 1.25-mile (2 km) self-guiding trail begins at the visitor center and winds through the ruins of Pecos Pueblo and the mission church. en.wikipedia.org/wiki/Pecos_National_Historical_Park