Bouddhanath stupa is one of the UNESCO world heritage sit of kathmandu valley. Kathmandu valley has 7 world heritage sites including religious temple side and monuments.
The stupa is regarded as the center of faith for the buddhist. So known as holly place for the worlds buddhist religion follower. Mythical believe is that the stupa was built in 5th century. but present structure is later one.
People comes here to offer the buddhas blessing. once who visit Nepal he/she never returned without visiting this holly place.