Raglan Castle offers free parking, entrance to the castle grounds cost around £7, there are dog water bowls provided and toilet facilities to the right of the castle.
You and your dog can explore the castle ruins and grounds to your hearts content, dogs to be kept on a lead around the castle, but there is a lot to see and each room has a sign post with information and history on it to enjoy.
There are also seats and displays to take a photo on. The staff were very friendly, just down the road is a cafe unfortunately dogs are not allowed inside. But overall a lovely day out to see some local Welsh history and explore somewhere a bit different.