Today's Geo Quiz sends us to the Tyrolean Alps. We're searching for a lake near Innsbruck, Austria. In travel brochures, it's often described as pristine and emerald green.

It's the largest lake in the Austrian state of Tyrol. The snow capped peaks that surround this lake attract skiers throughout the winter months.

The summer scenery brings out singers and pianists. Dozens come each summer to attend the Tyrolean Opera Program. Several weeks of intensive training in classical opera.... and a chance to sing to the mountains.

So name this Austrian lake where if you listen closely you might hear the echoes of a Mozart aria.

We'll pay a visit to the opera camp here...