I was reading a review about a nature preserve in Navarre (Urederra) and it said something about you need reservations for all Nature Preserves in Spain. Can someone enlighten me about that please? Do I get it online? Is it for parking? How do I know I am where a reservation is required?
Thank you!
I'm not familiar with the issue, but this tourist office page seems to indicate that they limit the number of visitors each day and you are can reserve an entrance date online. You might also find a useful email address or phone number on that site.