Western stairways to the Swayambhunath stupa

According to Swayambhu Puran, the entire Kathmandu valley was once filled with an enormous lake, out of which grew a mystical Lotus. The valley came to be known as Swayambhu, meaning 'Self-Created' or 'Self-Existent'. The Bodhistava Manjushri had a vision of the lotus at Swayambhu and traveled there to worship it.