26 Dicember i will go to Poland, advices & tips?

Hello people, from 26 dicember to 30 i will go to visit Poland! I will go to Warsaw, do you recommend something to visit?

I was 1993 in Warschau the last time. I remember there was a nice park. I think it was the Chopin Park.
And people in the bus got upset because I didn`t speak polish but german. These are my strongest memories about the city.

I know @Oxiu is from Poland but i have not seen him a long time on the forum so i dont know if he is online a lot still on PPG. But maybe you can send a message and he gets a message abt it. 🙂