Da Dia Rapids is another natural wonder in Phu Yen that should not be missed. It is a series of rock formations formed by volcanic activity millions of years ago. The rocks are arranged in a unique pattern, resembling a giant staircase. Take a leisurely walk along the rapids, hand in hand with your partner, and marvel at the beauty of nature. The sound of rushing water and the cool breeze create a romantic ambiance, perfect for a memorable experience with your loved one.