Shiva is worshipped in the Kumbeshwar Shivling in many temples in India and Nepal. Here is the story of Kumbeshwar form of Shiva. Kumbeshwar Shivling is associated with fertility, good harvest, water, and abundance.
Chandra, the moon god, once asked Brihaspati, the guru of devas, to perform the rajasuyajna. It required the conquest of the entire universe. Chandra conquered the universe and the collected wealth was brought to Mount Meru, the spot of rajasuya yajna. The sacrifice was completed successfully. Chandra’s success blinded him both morally and physically.
Chandra happened to see Tara, the wife of Brihaspati, and he was enamored by her beauty. Blinded by lust, Chandra carried her off and impregnated her against her will. Brihaspati did not get help from other Devas to avenge this insult as they feared the physical strength of Chandra.
Brihaspati then complained to Shiva and he decided to challenge Chandra. Brahma intervened and asked Chandra to return Tara to Brihaspati or Shiva’s wrath will burn him down.
But Chandra returned Tara along with their child. For fathering another man’s wife, Shiva cursed Chandra with a terrible disease. He was expelled from the world of the Devas.
Outcast and alone, Chandra wandered through the wild forests on earth and came upon the hermitage of Sage Agastya. Sage Agastya took pity on him and asked him to offer penance to the Pashupati form of Shiva.
Shiva ignored Chandra at first, but unwavering devotion of Chandra changed the attitude of Shiva. He approached Chandra and agreed to cure his affliction but for that he should consecrate a Shivling at particular spot and appoint Sage Agastya as priest. Chandra and Sage Agastya trekked to the assigned spot in the Himalayas and consecrated the Shivling and named it Kumbheshwar.
Sage Agastya then using his powers dug a well which connected to the Nagaloka, the world of serpents underground. Chandra was cured when bathed in the water of the well.
This particular temple and well (water tank) is found at Lalitpur in Nepal.