From Livorno: Scarlino exit, turn right along Vado all’Arancio
From Grosseto: Scarlino exit, turn left along Vado all’Arancio
Follow Vado all’Arancio, and cross the old Via Aurelia, through Scarlino Scalo, make the underpass, till you get below the town of Scarlino (up the hill) on 60 provincial road.
Turn left toward Gavorrano, 2 km later on the right turn at the entrance (pillars) of the Col di Sasso estate, right in front of La Pierotta wine estate.
San Sebastiano is located 1,5 km up hill.