Leopold's Crown Palace. It's hard to see, but we are on the opposite side of the lake of the 'backyard' of the Von Trapp's house.
The Gazebo! They don't let you inside anymore after an elderly lady tried to skip across the benches and broke her hip.
Frohnburg Castle - in the movie, this was the front of the Von Trapp's house. Here Melanie is running and trying to sing 'I am Confident!'