The hills are alive... with the sound of alphorns

It's summer in Europe and alphorn enthusiasts are making the most of the beautiful weather...

Alphorn musicians from Switzerland, Germany, Austria and France play together on Feldburg, the highest mountain in Germany's Black Forest region. Photo / AP

Image 1 of 11: Alphorn musicians from Switzerland, Germany, Austria and France play together on Feldburg, the highest mountain in Germany's Black Forest region. Photo / AP