Mision Santo Tomas de Aquino ruins

The ruins of Mision Santo Tomas de Aquino lie in the Santo Tomas valley south of Ensenada, founded by Dominican missionaries in 1791 as the first Dominican mission in the peninsula's interior wine-growing belt. What survives today is a low run of adobe and stone wall foundations, the outline of the mission church, and a stand of olive trees planted by the missionaries that are now well over two centuries old. No roof, altar, or interior fixtures remain; the mission was abandoned in the mid-19th century after repeated droughts and the secularization of the mission system, and the adobe walls have eroded to knee or waist height in most places. There is no formal museum building or curated exhibit at the site; it functions as an open-air ruin with the valley's vineyards and orchards, descended from vines the Dominicans first planted, growing around it. The historical significance lies less in the standing structure than in its role as the origin point of Baja California's wine industry: cuttings from the mission's vineyard were later used to found Bodegas de Santo Tomas, now Mexico's oldest commercial winery, in the same valley. No restoration work has been carried out; the ruins are preserved in their natural state of decay.