Depart Bolzano at the gateway to the Dolomite Mountains, and cross the Ega Valley on a road built in 1895 between the Rosengarten and Latemar mountains when the territory was part of the Austro-Hungarian Empire. Stop at Lake Carezza to admire the most beautiful lake in the Dolomite Mountains, and benefit from 30 minutes of free time to take a stroll around the lake if you desire. Next, journey towards the Costalunga Pass and see the historical luxury Grand Hotel Carezza, where former guests include the Empress Sissi, Winston Churchill and Agatha Christie. Continue to the Fassa Valley in Trentino, and pass through the towns of  Vigo di Fassa and Canazei to arrive under the imposing peaks of the Sella massif. Next, travel a long series of 27 hairpin bends (switchbacks) en route to the Pordoi Pass 2,239 meters above sea level. Stay for 1 hour, and take the cable car to Sass Pordoi, 2,950 meters above sea level (optional) when it's open (late May until mid-October and Christmas to Easter). Turn back on yourself and return to the Sella Pass to see the impressive vertical walls of the massif right before your eyes. Admire the glacier of Marmolada (3,343 meters) and majestic Sassolungo (3,181 meters), the most famous mountain in the Gardena Valley. After a 10-minute break to take photos, travel down the Sella Pass and enter he Gardena Valley, where you can explore its largest town with a 1-hour stop in Ortisei. Find a nice place for lunch before the return journey to Bolzano.