If you want to add some extra culture to your getaway, put Regina Coeli Diocesan Museum on your to-do list. Check if guided tours are available or just wander around at your own speed.
Santillana del Mar is where you'll find Regina Coeli Diocesan Museum. It's free, which means you'll have more money in your pocket to explore! Some other worthwhile attractions around the museum include Caves of Altamira, Santillana del Mar Zoo and Collegiate Church of Santillana del Mar.