Oh, ok. There are many great passes which are easy from the Alta Badia. The Gardena Pass is our favorite to drive. There's the Sella, Pordoi, Campolongo, Falzarego, etc. The Giau Pass is roughly between the Alta Badia and Cortina d'Ampezzo. Stunning vistas from the rest stop/restaurant at the "top" of the Giau. You could possibly do the Giau on the way from Alta Badia to Venice.
For up close spectacular views of the Dolomites by car, this is our own "Best of the Dolomites drive". It can easily be done in a day and covers drives over 4 Dolomite Passes.
It can be started/ended from any point really, but I'll use The Alta Badia:
Head to Corvara (Alta Badia). Here, take the Campolongo Pass to Arabba. From Arraba take the Pordoi Pass towards Canazei. Before you get to Canazei, take the Sella Pass (or stop in Canazei and go back a bit to continue). Take the Sella Pass and at the end, get right on the Gardena Pass (they branch off one another) towards Alta Badia and Colfosco. There's a cafe/restaurant/rest stop at the "top" of the Gardena, Sella and Pordoi Passes. You'll also notice a few small places to park along the passes to get out and walk among the Dolomite peaks.
For some info and photo's of the passes, check out:
www.alpineroads.com/dolomites.php
Some are listed under the German and or Italian name:
Gardena Pass - Grödnerjoch
Sella Pass - Sellajoch
Pordoi Pass - Passo di Pordoi
Campolongo Pass - Passo di Campolongo
Paul