Nepal has several restricted areas that require a special permit for trekking. These areas are mostly located in remote regions of the country that are culturally rich and less explored, making them a popular destination for adventure seekers. Here are some of the popular restricted areas in Nepal:

1. Upper Mustang: Located in the north-central part of Nepal, Upper Mustang is a desert-like region that used to be a part of the Tibetan empire. The trek offers stunning views of the Himalayas, unique Tibetan culture, and ancient cave monasteries.

2. Manaslu: The Manaslu region is located in the western part of Nepal and offers a challenging trek with breathtaking views of the Manaslu mountain range. The trek takes you through remote villages, lush forests, and high mountain passes.

3. Dolpo: Dolpo is a remote region in western Nepal that offers a unique cultural experience and pristine natural beauty. The trek takes you through ancient monasteries, barren landscapes, and the Shey Phoksundo National Park.

4. Kanchenjunga: Kanchenjunga is the third highest mountain in the world and the trek takes you through the remote villages and pristine forests of eastern Nepal. The trek offers stunning views of the Himalayas and the unique culture of the Limbu people.

5. Upper Dolpo: Upper Dolpo is another remote region in western Nepal that offers a unique cultural experience and stunning natural beauty. The trek takes you through the Phoksundo Lake, ancient monasteries, and high mountain passes.

Trekking in these restricted areas of Nepal offers a unique adventure experience that allows you to explore the unspoiled natural beauty, diverse culture, and ancient history of the region. However, it is important to respect the local traditions, customs, and environment while trekking in these areas.