The Boudhanath stupa is one of the largest in the world.
It was damaged in the 2015 earthquake but with support from the Buddhist community it has been fully restored in under 2 years. On story claims the stupa was founded by a widow. When she asked the king for permission she was told it could not be bigger than the size of a single ox skin.
However the cunning widow cut the ox skin into thin strips. The result is the 6,756 square meter site which was listed by UNESCO in 1979. Take some time to wander around, watching today's widows turning the prayer wheels, looking around the shops selling singing and medicinal bowls or painted mandalas or