1. Muong Hoa Valley, also known as Thung Lung Muong Hoa in Vietnamese, is a stunning valley located in Northern Vietnam near the town of Sapa. The valley is famous for its breathtaking terraced rice fields, which have been cultivated by the local ethnic minority groups for hundreds of years. The landscape is incredibly picturesque, especially during the rice planting and harvesting seasons when the fields are a vibrant green or golden yellow.

2. There is no specific working time for Muong Hoa Valley as it is an open and natural area that can be visited at any time. However, it is recommended to visit during daylight hours for the best views. If you need more information, you can contact the Sapa Tourist Information Center at +84 214 3871 160.

3. There is no ticket required to visit Muong Hoa Valley, as it is a public area. To get to the valley, you can either take a trekking tour from Sapa town, which is about a 10km hike, or rent a motorbike or hire a local guide to take you there. The valley is accessible by road and there are also hiking trails that lead through the rice fields and to local villages. It is recommended to wear sturdy shoes and bring plenty of water and sunscreen when visiting Muong Hoa Valley.