Although not directly in Nghe An, Phong Nha-Ke Bang National Park is worth considering for a family trip as it's located nearby in Quang Binh Province. This UNESCO World Heritage Site is famous for its stunning caves and karst formations. You can take a boat tour to explore the impressive Phong Nha Cave, go on a thrilling adventure in the Dark Cave, or visit the Paradise Cave, one of the most beautiful caves in the world. The park also offers jungle trekking, zip-lining, and cycling activities, ensuring an exciting and memorable experience for the whole family.