As a former student of the local university, I had been many times to the cathedral but being up on the roof showed me a lot of things I didn't know about the cathedral.
They will take you to the cathedral stone roofs (don't wear high heels!), where you get great views of the old city.
€10 for 30-45 minutes, everyday 10am to 2 pm, 4pm-8pm. Booking recommended (especially in summer), entry via Pazo de Xelmirez, Praza do Obraodiro.
I asked the guy at my hotel for a good restaurant, a place where locals go to, and he sent me to this place. It's near Rialto.
To be honest, we saw the queue and for a while we thought of not going in, but we waited (not for long, the service is very quick, maybe too quick) and the place was great. Fantastic food, good prices and a lot of locals.
Calle d. Madonna,San Polo 594
Send your feedback or queries to firstname.lastname@example.org