On the other side of the valley, the Bouddhanath stupa is the largest in Nepal. Its massive white dome looms over concentric ascending terraces and presents an impressive sight. There are 108 images of the Buddha set around the base of the stupa. Tibetan Buddhist monasteries are scattered all around and a large Tibetan community resides in the area. According to legend, builders used dew to mix the mortar which they collected by spreading cloth on the ground as Kathmandu was reeling under a drought during its construction. UNESCO has declared Bouddhanath a World Heritage Site as well.