On the sixth day, visit the Pho Hien Ancient Town, located on the banks of the Red River. Explore the well-preserved historical buildings, including temples, pagodas, and old houses. Take a boat ride along the river and admire the scenic views. Don't forget to try the famous Pho Hien specialty, banh te (rice cake), at one of the local eateries. Immerse yourself in the rich history and cultural heritage of the town.