Royal bay is lovely with a really nice waterpark as part of the complex, but there is not much around the complex to see or do, Santa Marina is also very nice, although not as grand as Royal Bay, but has the advantage of being across the road from the beautiful Golden Fish Beach, also there are trains and horses and carriges to go to Sozopol which is a charming town with a fishing harbour and an international marina........I`d go for Santa Marina as there is loads to see and do around about.