Riva is incredible... on of the most beautiful places I have ever seen.
A view from our bed-and-breakfast window..

View from the launching area before the Ora fills in. 
Actually, this is the day after the regatta ended, its overcast, and I don't think the Ora ever filled in. 
But when it does.... what a place!

Another view from the launching area.

The Cliffs. If it is windy, head for the point where the tunnel entrances change, and short tack up the cliff. Stay as close to the cliffs as you can. It is so much better near the cliffs that you may wish to gybe at the windward mark - rather than sailing the reach rhumb line - reach into the cliffs for the wind, go down the cliffs, and then gybe out and sail the reach at a very high fast angle. Needless to say, you gybe set for the run, and head for the cliffs.

Imagine 38-55 5o5s (depending on the year), a 14 fleet almost as large, and a significant number of board sailors all trying to use the same windy spot under the cliffs....

More views of the cliffs