One Drin tributary is the Valbona River , which drains into the Adriatic Sea , and its eastern tributary the Gashi River .
But not all of the Drin flows near or parallel to the Alps .
One Drin tributary is the Valbona River , which drains into the Adriatic Sea , and Drin 's eastern tributary the Gashi River .
But not all of the Drin flows near or parallel to the Alps .