I was talking with a forum member about the Norte recently, and I suggested that she might want to avoid what is reputed to be a very industrial slog, the stage between Gijón and Avilés (I can’t tell you from personal experience, because I have never done it).
Gronze has a schematic map that shows the alternative clearly. At Villaviciosa, you can take a detour to visit the amazing church at Valdediós and continue to Pola de Siero (or, depending on where you started, you could also stop earlier at Vega de Sariego, 10 km before Pola de Siero, nice albergue). Next day into Oviedo, with a short day you have a lot of time to visit some of this beautiful city. The following day, up to Avilés on a nice path, and into Avilés without going through any of the industrial part. I have done this several times, because I would jump at a chance to visit Oviedo, which has a lot of Camino significance in its own right. Not much longer either!
Gronze has a schematic map that shows the alternative clearly. At Villaviciosa, you can take a detour to visit the amazing church at Valdediós and continue to Pola de Siero (or, depending on where you started, you could also stop earlier at Vega de Sariego, 10 km before Pola de Siero, nice albergue). Next day into Oviedo, with a short day you have a lot of time to visit some of this beautiful city. The following day, up to Avilés on a nice path, and into Avilés without going through any of the industrial part. I have done this several times, because I would jump at a chance to visit Oviedo, which has a lot of Camino significance in its own right. Not much longer either!