Yes, the 14 days upper mustang is worthwhile for many trekkers. The 14 days upper mustang trek landscape is breathtaking. You will be mesmerized by the stunning landscapes with unique rock formations, colorful cliffs, monasteries, and unique architecture and panoramic views of the Himalayas, including the Annapurna and Dhaulagiri mountain ranges. Also, the upper mustang region is rich in culture and gives an opportunity to immerse yourself in Tibetan distinct culture, interact with local communities, and witness their way of life.