Upper Mustang Trekking region of Nepal is a hidden and mysterious place, protected by the highest mountain range on earth. It is located in the north of the Annapurna Massif and borders the Tibet Autonomous Region in China. This area has only recently been opened to outsiders, preserving its unique culture and untouched way of life. The region has a rich history and is a must-visit for students of Asian history. Access to Mustang is controlled, but with proper permission and documentation, a traveler can experience its unique culture and outdoor adventure. The best way to access Mustang is to fly to Jomsom and begin either a trek or a mountain biking adventure. This will take you to the walled city of Lo Manthang, towering sand spires, and ancient salt trading routes. Because of its location in the rain shadow of the Annapurna area, it is drier and the landscape is more akin to the Tibetan Plateau. The best times to visit are during the low seasons of Nepal, but even winter is an option for those who can handle the cold temperatures. A visit to Mustang will transport you to a world almost forgotten, where time seems to have stood still.