Alfonso XIII inaugurates the Sosa siphon Historical milestone · Almunia de San Juan, Cinca Medio, Huesca Image of Almunia de San Juan, not of the place itself. The king released in 1906 the waters of the Canal of Aragon and Catalonia in the greatest masonry work of the route; the irrigation transformed the comarca's dry farmland and gave rise to the irrigators' community of the right bank of the Sosa. 2 de marzo de 1906 Photo: Ecelan (CC BY-SA 4.0) What to see and do in Almunia de San Juan