Rastenfeld, AT
Burg Ottenstein is a castle in Lower Austria, Austria. Burg Ottenstein is 503 metres (1,650 ft) above sea level. It was first referenced in 1177, and was later restored by the Counts of Lamberg in 1624.
Listen to the audio guide for Burg Ottenstein Free on WIP — starts by itself when you arrive, even with the screen off