Spectacular scenery through mountains all the way. Nice restaurant with views across to the coast at Coll de Rates. Although there are a lot of hairpins (one so slow I was tempted to put a foot down) there are also some nice sweepers and some quick strights. There is little traffic on the road but it does appear from nowhere. After Callosa D'en Sarria (turn right on CV 755 the road gets a little more civilized and just before Guadalest there is a little motorcycle museum (lots of Ducati singles) on the left. Then you will want to do it the reverse way. Guadalest is a fantastic village perched precariously on a rock and is only about 15 miles from Benidorm so pleanty of nightlife. You could also combine it with the route from Altea to Gata de Gorgos another 22 miles
Superb fast(ish) road from Altea with some terrific sweeping bends. Generraly quiet early morning but thereis a strong Police presence on Sundays. The road winds through a quarry just before Gata with some very interesting (blind) bends. Overall can be quite challenging but you are rarely alone as it is a well known biking road amongst locals.
A really good selection of tight hairpins, fast sweepers and a nice view as the road rises up from sea level to around 1000m. As this is rural Spain, you may need to pay some attention to farm animals straying into the road (although I didn't see any on the way). This route is ideal if you've just got off the ferry from Santander.