Known as the Waltz King, Strauss Jr. was a master of clever transitions and key changes. There are many twists and turns in this piece, and a surprise around every corner.

The Blue Danube (An der Schonen, blauen Donau)
by Johann Strauss II
arranged for piano accordion by Frank Fusari


this score is free at my Musescore channel: https://musescore.com/user/29357996