Asia`s largest stupa, `Boudhanath` is one of the most important stupas outside of Tibet as thousands of pilgrims gather daily to make a ritual circumnavigation of the dome, beneath the watchful eyes of the Buddha, which gaze out from the gilded central tower. Tibetan monks in maroon robes and shaved heads wander the prayer flag–decked streets while pilgrims spin prayer wheels and stock up on yak butter and tsampa (roasted barley flour).