Because each destination represents a different and important part of central Tibetan culture.
In Lhasa, you experience the political, religious, and pilgrimage heart of Tibet through the Potala Palace, Jokhang Temple, Drepung, Sera, and Barkhor.
In Tsedang, the journey moves back to Tibet’s early royal heritage and the beginnings of Buddhist development, with Samye Monastery, Yumbulagang, and Tradruk Temple.
In Gyantse, the focus shifts to Buddhist art and architecture, especially at Pelkor Chode Monastery and the Kumbum Stupa, where chapels, murals, statues, and architectural design reveal another side of Tibetan religious culture.
Then in Shigatse, Tashilhunpo Monastery introduces the Panchen Lama tradition and shows how Tibetan Buddhist life developed around another major religious center beyond Lhasa.
Together, these four places give you a more complete picture of central Tibetan culture, rather than showing you only one region or one historical period.