Post date: Jul 28, 2010 5:9:49 PM
The establishing shots of the prison castle in Germany 1916 ("Trenches of Hell") were done at Orava Castle in Slovakia. The shot of Indy being taken there via boat was across the Orava River. This castle is also famous for being the primary location in the 1922 film Nosferatu. However, it appears all other castle shots in the episode were done elsewhere.
Coordinates:
49° 15′ 42″ N, 19° 21′ 29″ E