Linga has three parts. The uppermost part is called the Shiva pitha, the middle part is called the Vishnu pitha and the lower part is called the Brahma pitha, which lies underground.
Linga, also commonly referred to as Shiva lingam, denotes a phallus and the base of the linga is considered the yoni, or the female sex organ. The linga and yoni forms are suggestive of the creative energy of male and female.
Considered the cosmic symbol of unity, linga has been worshipped since ancient times. It is believed that worshipping linga on Maha Shivaratri produces amazing benefits to the body and soul.