Start your weekend trip to Hung Yen by exploring the ancient citadel of Pho Hien. This historical site dates back to the 16th century and was once a bustling trading port. Take a leisurely stroll through the narrow streets lined with old houses and temples, and immerse yourself in the rich history and culture of the area. Don't forget to visit the famous Hien Pagoda, known for its beautiful architecture and serene atmosphere.