No special access issues
Coming from Canazei, take the indications to Passo Pordoi / Passo Sella. Drive until you find Lupo bianco restaurant on the left. Go over it, keep the right and drive for other 1.2 km. At the cross road go left (Passo Sella / Passo Gardena). 600 meters ahead you will reach the restaurant Pian Schiavaneis. Now drive for 2.9 km and get close to the base of Piz Ciavazes. If you want to climb on its routes, leave your car on the left side of the road in the large space. If your goal are the Torri del Sella (Sella Towers), drive 2 km more and reach the hotel Maria Flora, where you can park.
From the respective car parks Piz Ciavazes and Torri del Sella are clearly visible. There are evident paths starting from the parks and heading to the walls.
The approach to the routes is reported in their descriptions.