Siddheswar Temple is a Hindu temple located in Arghakhanchi, Nepal. It is one of the largest Hindu temples in the country and is considered one of the four holiest Shiva temples in Nepal. The temple complex, located on the bank of Bagmati River in the old town of Arghakhanchi, is dedicated to Shiva, the destroyer of evil. The temple is a fine example of Hindu architecture, featuring an ornate idol of the god Ganesh and numerous shrines dedicated to various Hindu deities. The temple is also a great place to observe the Nepalese culture.