This is the Kitzbüheler Horn in Austria, which is decorated with winding roads. The striking blue lake is the Hornköpflsee. It is accessible via a steep path, but the weather was so hot, I didn't attempt the climb
Beautiful mountains, I grew up on the other side, in Bavaria, not all to far from Kitzbühel, in Garmisch-Partenkirchen. I do miss the mountains down here in Italy.