Have a some extra time in Germany? Come to Cuxhaven (high speed train available) and go to the Penguin Museum, along with the wonderful horse-drawn carriage ride to Neuwerk Island :-)
https://thepanchobrothers.com/2019/01/18/5-reasons-to-visit-the-north-sea-in-winter/
Helped with Penguicon Registration since 2014. CISO at Altair Engineering, Inc. Please reach out if I may assist with anything. Cheers!