Church of Osera de Ebro Monument · Osera de Ebro, Comarca Central, Zaragoza Church of Santa Engracia, built in 1575 and restored in 1985, next to the remains of an old medieval castle; its bell tower is one of the town's most recognizable features. Photo: Millars (CC BY-SA 4.0) What to see and do in Osera de Ebro