They are known, variously, as sadhus (saints, or 'good ones'), yogis (ascetic practitioners), fakirs (ascetic seeker after the Truth) and sannyasins (wandering mendicants and ascetics). They are the ascetic  and often eccentric  practitioners of an austere form of Hinduism. Sworn to cast off earthly desires, some choose to live as anchorites in the wilderness. Others are of a less retiring disposition, especially in the towns and temples of Nepal's Kathmandu Valley. If the Vale of Kathmandu seems to boast more than its share of sadhus and yogis, this is because of the number and importance of Hindu temples in the region. The most important temple of Vishnu in the valley is Changunarayan, and here the visitor will find many Vaishnavite ascetics. Likewise, the most important temple for followers of Shiva is the temple at Pashupatinath. Vishnu, also known as Narayan, can be identified by his four arms holding a sanka (sea shell), a chakra (round weapon), a gada (stick-like weapon) and a padma (lotus flower). The best-known incarnation of Vishnu is Krishna, and his animal is the mythical Garuda. Shiva is often represented by the lingam, or phallus, as a symbol of his creative side. His animal is the bull, Nandi, and his weapon is the trisul, or trident. According to Hindu mythology Shiva is supposed to live in the Himalayas and wears a garland of snakes. He is also said to smoke a lot of bhang, or hashish.