While we did a good job with Salzburg the previous day, we didn't finish it all, so before heading out we went to Mirabell Palace and its nice gardens, and then the Historic Cemetery of St. Sebastian before we picked up all our stuff and drove out:

some of the Mozart family is burried there

From there, we drove in the wrong direction (since we going to Munich ultimately) to see Hallstatt and Eagle's Nest, the mountain residence where Hitler used to live. This is because Rick Steve's recommended it highly like pretty much all jewish/holocaust related sites, but honestly this was not the best one, and by far. The actual house Hitler used to go to there is very hard to reach on top of a mountain you can only access with hourly-ish busses, and once you're there, it's a nice mountain, but the house has been replaced with a restaurant, and there is nothing historical to really see.
Back down, there is a documentation center that explains some history on Hitler, but nothing that was not in Munich or Daschau on our next stops, and the bunker/underground visit was closed for renovation, so there was ultimately no reason to spend the 5-6H this side trip cost us, and we should have spent the extra time in a Munich Museum instead:

after almost 1H to get to the almost top, there was a long line to get into an elevator in a tunnel. We should have hiked to the top instead

time wasted...

peak of the mountain

at least we got a good view, usually it's supposed to be foggy/in the clouds

documentation center

Jennifer who didn't know much about this side of history, having gone through the US public system, took a fair amount of time to read all the boards, and eventually we did the longish drive to Munich and aimed directly for Nymphenburg Palace that's outside of town, and where we'd get just under to visit before they closed at 18:00.
The palace grounds were huge, Versailles like, and the palace and adjacent buildings with collections, were quite nice too:

we got lucky to see this owl trying to sleep

And by then our day was almost over, but went to the Google building to go visit a coworker, and do a building tour