Hello milly123
And welcome to the Polish Forum.
Are you afraid of heights? :)
The mountains on the way to Spain from here are some of the the most spectacular I have ever seen (in Switzerland especially)
But you are looking for a way round that, so then i am not saying it is impossible but look at that is going to be tricky. But follow the coast looks the best way, through north Germany, down to Holland and all.
i have just driven from
from Portugal to Poland