Gyaltse Kubum stupa.
Gyaltes Kubum stupa was founded by first Phenchen Lama and Gyaltse local King Rabden Kusang in 15th century.
This stupa name called Kubum stupa,(ku) mean-status,(bum)mean- hundred thousand.
It has 6 stories and 77 chapels inside.Also can say,it is the biggest stupa in Tibet.