The area where I live is an extraordinary place for bikers. The region i full of small winding roads with only little traffic. The region of "El Priorat" is very calm with small villages and wine cellars. If you are interested in wine, you would enjoy visiting some of the cellars and tasting the extraordinary red wine. The Priorat wine is a little expensive but youy could buy very decent wine paying a reasonable price in the bordering wine areas of Terra Alta and Montsant. In this region you will discover numerous hermitages and the Scala Dei Abbey which deserves a visit.
If you want to relax for a couple of days, you could leave the rough landscape of the mountains and ride for an hour to the seaside, to the Ebre Delta where you could relax and enjoy the scenery, surrounded by rice fields and all kind of birds. No far away you could visit the town of Tortosa with its Cathedral and its castle.
And if you don't like motorbikes... come here by car!