In reply to sarahkeast: Agree wholly with the other posters, Espolon Central is a long but excellent day out (get an early start especially if not used to routes of this length). Barranco Del Infierno is great fun (see this recent thread:
http://www.ukclimbing.com/forums/t.php?t=561876 ) and The Bernia Ridge is probably the most popular of the Costa Blanca Ridges (a couple of exposed sections and abseils and one short ver well bolted of slightly harder climbing). Also the Via Ferrata on the Ponoch is worthwhile if you have lanyards or can rent locally. I'm sure the guys at The Orange House will be very helpful with local knowledge too.