The 19th century Iglesia de San Lorenzo (Loreto) is high up on the hill to your left as you enter Peñacastillo.
Nuestra Señora de Loreta, patroness of the city, is celebrated at the start of July.
The camino does not leave the N-611 until it gets to the border between Santander and Peñacastillo, a point which is marked. Here it turns right and then immediately after crossing over the railway it turns left. This road winds a bit but is well marked, taking you under two large highways and into Santa Cruz de Bezana.