It is close to our school (in Ribadesella), and believe it or not, it is a good place to practise your English!
You just have to pay attention to the panels and read the English version.
Here's an example:
"The Tito Bustillo Cave, discovered in 1968, is one of the most important rupestrian sets of Palaeolithic Art. Together with other caves of the Cantabrian, it was declared Heritage of Mankind in June 2008 for its extraordinary representations of Palaeolithic Rupestrian Art." Easy, isn't it?
If you visit the centre before 28th March 2011, you won't have to pay to see it.