At least once in their lifetime, Tibetans want to go to the Jokhang Temple. Pilgrims (kora) from all corners of Tibet come to the temple, the most sacred place in Tibetan Buddhism.
The temple is actually circumambulated by the pilgrims on three different circular walkways. They walk in a clockwise direction in the streets. They honour their deities by praying sacred mantras and turning their prayer wheels.
The innermost circumambulation walkway is the Nangkhor - with the Jokhang Temple in its centre.
The middle circumambulation pathway is the Barkhor - which actually comprises a square and a one-kilometre-long street around the Jokhang Temple (Tsuglagkhang). Today, Barkhor is also a busy shopping street where tourists buy souvenirs.
The circumambulation walkway Barkhor is surrounded by the old city of Lhasa followed by the outmost walkway, the Lingkhor. The Lingkhor allows pilgrims to circumambulate the whole city.