A trail leads into an ever-narrowing defile between bluffs of wind-sculpted sandstone. Eventually the walls draw in so closely that you can reach out and touch either side, but then the narrow space opens into a hidden canyon in the heart of the hills. A sprawling monastery with dark, narrow windows and red tile rooftops stands in the middle of this natural amphitheater, ringed by sandstone cliffs all around. Ahead, a weathered flight of stone steps leads up to the closed monastery doors. The plain doors are made of heavy timber with iron studs. A dusty footpath circles the building.