The Passo Sella 

The Passo Sella connects the Passo Gardena and the Passo Pordoi, which together with the Passo Campolongo make up part of the Sellaronda route of the Maratona dles Dolomites.
This is as good as it gets as far as cycling routes go, nothing beats this.
Descending off the top of the Passo Sella into the Gardena Valley is like entering some mythical forgotten paradise.