After visiting the Palazzo Pitti, you blithely make your way to the heights of the Boboli Gardens. The view of Florence is stunning, but a grotto on your right draws you with its freshness. Just at the entrance, a statue is decked with beautiful lemons. Are they real? Are they virtual? Why can you smell the fragrance of Italian lemon, petitgrain, bitter orange and galbanum? And that whiff of black pepper and cloves, where does it come from?