Here are people who have the sense to put roads in the valleys, along rivers - flat terrain even though surrounded by high mountains.
Well, that is if you are following the Sava all the way down to Zagreb. Which we are not. Soon we are to deviate - go west! Now the real climbing starts. Polish mountains were a child's game - Czech hills a walk in the park.
And yes, it is warm on "The Sunny Side Of The Alps" - no quantity of water can quench our thirst.