Santillana del Mar is said to be one of the prettiest villages in Spain because it's so well taken care of. It's a pleasure to walk through the streets and see the pretty houses with their flowers and balconies. The best plan is to visit the town during the Renaissance festival when the plaza fills up with medieval stands and people in period dress. It's like going back in time! Since it's only a few streets wide, you can see Santillana del Mar pretty quickly, but it's best to take your time and enjoy all the history that happened there.