The Shivalinga is the tallest in the world with a height of 65 ft (20 m). The Temple is spread over an area of 25 acres (10 ha) and is surrounded by river. It took around 30 years to complete the construction of the huge Shivling. The temple is a major tourist spot and is visited by devotees from all over India every year on Shravan Poornima to worship Lord Shiva.Shravan Poornima is the full moon night in the holy month of Shraavana. It is the month of festivals and pious rituals. On the fifth day of the bright half of the holy month of Shraavana the ritual of worshiping a cobra popularly known as Nag Panchami is celebrated. Owing to its religious importance Harihar Dham is also a popular place for marriage for people of the Hindu religion.