In reply to NottsRich:
The routes near Calpe will keep you amused for days, excellent climbing and right by the coast. Further in land Echo Valley is also very good but some routes will require a trad rack.
A couple more QDs as the routes are well bolted and I found my draws being eaten up quickly but if you are confident you can always run stuff out. And I would take two ropes if you can, makes abseiling much quicker and means more routes!
The new Rockfax guide is by far the best, and the Orange house also has guides for Via Ferrata if you have time, which I can assure you are very good.
Take some small pieces of warm kit, in the afternoon it can get a little chilly but overall should be very pleasant weather.
Have a great time, it's certainly a place I would recommend to any climber.