Interior shot of St. John's church with altar and Carolingian frescos, cloister Muestair, Muestair, UNESCO World Heritage Site Muestair, Engadin, Grisons, Switzerland

unesco world cultural heritage sight nobody architecture engadin europe cloister column vault grisons abbey carolingian renaissance unesco abbey religion landmark church travel graubuenden pew switzerland arch fresco landmark travel destination engadine indoors ceiling pew christianity altar