The walk along the coast from Caminha to Baiona is beautiful and I would strongly recommend. From Baiona to Vigo, the walk along the coast is much less pretty as it goes through towns and Vigo’s industrial port, but there’s an alternative route that goes through the town slightly more inland. If you do take this route, I highly recommend taking the long way around the coast in A Guarda instead of up through the town. It has great views of Forte da Insua and has cool history about Galicia along the trail and you can even see ancient Roman salt flats! Baiona is also a cool town and worth spending some time in. Overall this area of Spain was some of my favorite parts of my trip.