Yellow arrows in Baiona?

I wasn't really sure which forum to place this in, because I don't know which Camino I'm asking about!

I was in Baiona recently (south of Vigo, on the coast) on a non-walking short trip through the Sil River Canyon and part of the Minho River area (which I would highly recommend, but that's another story). Anyway, in the lovely town of Baiona, walking through the old part, I saw some yellow arrows. I can't figure out what route it's on.

And since I know we have such great experts on this forum, I was hoping someone could enlighten me! Thanks, Trisha

Thanks, Sil, for that quick answer.

I had never heard of the Camino del Invierno -- I checked out the website and it looks like it would be a very pretty walk. When we were in the Sil Valley, we stayed in a parador (Santo Estevo de Ribas do Sil), and spent several hours walking on what appeared to be a long distance trail along the river, but I never did get the details on its origin or end point, so maybe this is it.

But the Sil area wasn't where I saw the arrows. I saw them in Baiona, which is right on the coast, about 35 km (as the crow flies) northwest of Tui, which is on the Camino Portugues. I don't see any variants of the Portugues that would go through Baiona, so I'm still not sure why those arrows were there!

Many thanks from Trisha.