Kathmandu Lhasa tour is the best Nepal and Tibet tour.

Chaksibari, Thamel, Kathmandu, Nepal

Tibet is at the highest plateau on the earth with its Himalayan Peaks soaring above 8,000m. The vast empty land in the rain shadow of the Himalaya, was isolated until very recently, nourishing its own unique culture and biosphere. Tibet is remote and yet unexplored.
Lhasa, literally meaning Holy Land is the cultural and religious center of Tibet. Lhasa s History goes back to 7th century with the powerful monarch Songtsen Gampo moving to Lhasa. The palace was erected at the place where there is famous Potala palace now days and Lhasa became the capital of great Tibet.
Shigatse, the second largest city in Tibet, is another political, economic and religious center other than Lhasa. Shigatse has been the seat of the Panchen Lama, who is traditionally based in Tashilhunpo Monastery. Tashilhunpo is one of Tibet s highlights and is Shigatse s foremost attraction.
One can drive to the base of Mt Everest (Quomolangma) and explore further up on foot. Mt. Everest lies in the Tingri country of Tibet. Everest region has four peaks above 8000 meters and 38 peaks above 7000 meter, thus is reputed as the Third Pole on the Earth.
Nepal and Tibet could be planned in one go. The famous Nepal Tibet tour is Kathmandu Lhasa overland tour of 9 nights 10 days. More details are available at https://www.itournepal.com/tibet.php We will fly to Lhasa from Kathmandu and tour around while acclimatizing. Then we leave Lhasa in a 4WD over high passes with magnificent view of lakes and Himalayas. En route we visit Xigatse, Gyantse and drive to Rongbuk monastery at the base of Everest. Explore Everest on foot and spend one more night in the vicinity. From there we will drive down the world's highest slope to green foothills of Nepal.