JD, in addition to Barcelona's Gaudi sites, Catalonia has quite a collection of Dali sites . Both Pubol (Gala's castle) and Figueres (a museum he designed for HIMSELF) are doable in a day via a car while staying on the Costa Brava; we stayed in Calella de Parafrugels. Caladques is a bit further out and the road is not a fast one, however, Dali's beach house is stunning. If your taken by the fantastic architecture of Catalan, you may want visit old Girona and be certain to visit Casa Maso; it's a stunning preservation and not to be missed if you're in Girona. BTW - just across the border in France is Collioure which I loved even more than Calella. Additional details available if you'd like them.
Buen Viaje.