Annual Christmas Eve tradition of lighting the luminarias at Tumacacori Mission in Tubac, Arizona. Approximately 2500 candles in brown paper bags line the path to the historic mission. Tumacácori National Historical Park is located in the upper Santa Cruz River Valley in Santa Cruz County, southern Arizona. The park consists of 360 acres (1.5 km2) in three separate units.The park protects the ruins of three Spanish mission communities, two of which are National Historic Landmark sites. It also contains the landmark 1937 Tumacácori Museum building, also a National Historic Landmark. The first Spanish Colonial Jesuit missions in the locale were established in 1691, Mission San Cayetano de Tumacácori (at Tumacácori) and Mission Los Santos Ángeles de Guevavi, are the two oldest missions in southern Arizona. The Franciscan church of Mission San José de Tumacácori, across the river from and replacing Mission San Cayetano de Tumacácori, was built in the 1750s. The third mission was established in 1756, Mission San Cayetano de Calabazas. The Mission San José de Tumacácori complex is open to the public. Nearby are the park's visitor center and the Tumacácori Museum in a historic Mission Revival style building. The Guevavi and Calabazas missions are not open to the general public, but can be visited on reserved tours led by park staff.