Route advice: From Barcelona to Donostia St. Sébastián

Hey folks,

I'M planning to ride from BCN to St Sébastian on my bycicle,currently I'm staying in Bcn.

I have maps and a small Idea to get there, but I really would like to know if there are places on the way that I must have seen, or where it iis nice to be, according to cultural experiences, beautiful landscapes and not that touristy magnets.

If you have recommendations on the route, or you mean "dont go that way!!" let me know

And if you live on the way and want't to meet up, or have a space to sleep... I'll be glad for my first warmshower experience ;-)

Cheers