Join一 upcoming events being held in Huyện Trấn Yên. Huyện Trấn Yên is a picturesque district located in Yen Bai Province, Vietnam, known for its stunning natural landscapes, including the majestic Thac Ba Lake, sprawling rice terraces, and lush forests, as well as its rich cultural heritage, making it an ideal destination for those seeking to immerse themselves in the beauty and traditions of Vietnam.