altdahn castle, a castle ruin in the palatinate forest

age altdahn ancient architecture beautiful boulder building castle castles cliff clouds coast dahn elevator evening forest formation fortification fortress freight geology germany grafendahn hill historic historical land landmark landmarks landscape light middle monument mountain mountains national old palatinate park pfalz rheinland rhineland-palatinate rock round ruin ruined ruins sandstone scenery scenic sea sky stone summer sunrise tanstein temple terrain tourism tourist tower travel vacation view wall