The San Millán monasteries of Suso and Yuso are a fine example of World Heritage sites which perfectly combine religion, tourism and culture, allowing religious life to continue uninterrupted from the 6th century to the present day. The first monastic community established in Spain was at Suso and this is where you can still find the oldest altar in the country, on which St Millán celebrated the Eucharist − a spiritual task which is still performed today at Yuso by the religious order of the Augustinian Recollects.