South of downtown San Antonio, four historic mission compounds follow the San Antonio River through neighborhoods that remain part of the modern city. The National Park Service preserves Mission Concepción, Mission San José, Mission San Juan and Mission Espada as San Antonio Missions National Historical Park. Their churches, plazas, fields and irrigation remains make more sense as a connected landscape than as four unrelated photo stops. The park is free to enter, and the UNESCO property is broader than the federal park boundary.
The first Spanish mission in the area was established in 1718; within thirteen years, five mission communities had been founded along the river. They belonged to a colonial frontier system intended to evangelize, settle and defend northern New Spain. The mission project also reshaped Indigenous life through conversion, labor, farming, language and new political authority. A responsible account must hold these histories together: the sites are architectural achievements, but they were also instruments of colonization that profoundly altered existing communities.