Baba (Hindu devotee) smoking a chillum of bhang (ritual cannabis) at the Shivaratri Hindu festival at the Pashupatinath Temple in Kathmandu (Nepal).
The ritual marking on his forehead is called a Tilaka.
During the Shivaratri festival (the 'Great Night of Shiva'), thousands of Hindu devotees and pilgrims gather at the Pashupatinath Temple to pray and celebrate Lord Shiva. Smoking holy Ganja is part of the ritual.
For more info about religious use of cannabis, read en.wikipedia.org/wiki/Religious_and_spiritual_use_of_cann....
For more information and to see other photos of the Shivaratri festival and the Pashupatinath Temple, read the album description.