natural bridge in the village puentedey formed by a flowing river. tunnel within rock underneath a village in spain.

waterway ruins bridge river fortification arch rock wall water monastery cliff terrain castle canal tree landmark tourism architecture building natural village puentedey formed flowing tunnel underneath spain scenery cave hollow walk hole big vast natural stream flow water river rock bridge tunnel outside erosion ancient building caves prehistoric cliff landscape europe tourism nature spain architecture history historic stone town village travel medieval landmark scenic mountain burgos old arch castilla view beautiful outdoor leon