Please read before posting!

Wanted to make a thread but thought that asking here would be better.

Yesterday I saw this post ( https://www.reddit.com/r/germany/comments/ujhf30/an_amazing_airplane_museum_flugwerft_schlei%C3%9Fheim/ ) and I googled the museum and the details surrounding it and it looks like a very nice place to visit, esp with the 9€ tickets coming out soon. So my idea is, what are the 'MUST SEE' places in Germany in your opinion?

I've been living in Germany for about 15 months and haven't really toured the country that much. So getting a list or suggestions with places to visit/see would be a nice idea. Maybe the mods can get a temp thread for it or someone just pitches in with a list and people recommend other places, would make it much better to plan the 3 months of the 9€ ticket.

/r/germany Thread