Avancorpo di Sinistra lies just above the crag Il Castello Invisibile and strikes with its very compact orange and grey wall. The crag is divided into two sectors, with sector A being recommendable for its beautiful routes around the grade of 6b. Due to its orientation, the crag is exposed to the sun almost the entire day.
Follow the road in the direction of Sperlonga to the entry of the tunnel. There, walk up right on short stairs to a path; right after, follow a steep path up left. At the subsequent intersection go straight and a short distance later go left to the well visible crag.
From Sperlonga take the road in the direction of Gaeta. After a few kilometers you pass the last open tunnel and a sandy beach can be seen on the right side. A few hundred meters after the tunnel you reach the city limit of Gaeta. On the left side, a side road with several parking spots runs parallel to the main road. It is best to leave the vehicle near the restaurant Ristoro da Guido. From Gaeta drive in the direction of Sperlonga. On this road you will reach a long stretch of straight road (with a long sandy beach to its left). Parallel to the main road there is a side road on the right side. On this side of the road there is the restaurant Ristoro da Guido, near which you can leave the car.