On Monday we walked to Cueva Nuestro Padre and Cueva Chica. It was about 20 minutes walk from our accommodation to the national park (200 RD entrance fee) then a loop inside the park to see the caves. We had a nice walk far from the cars so the air was wonderful, but the caves themselves are quite small (at least the entrances) and maybe they are good for divers (although there were none). But our conclusion was that they were nothing special. It was great to have a walk in the park, but the caves were not worth it.