Naimisaranya is located at the junction of the roads from Sitapur and Khairabad, 32 km from Sitapur and 42 km from the Sandila railway station, 45 miles north of Lucknow – the capital of Uttar Pradesh. Naimisaranya is also known as Nimsar or Nimkhar and is located on the left bank of the river Gomati. The sacred well, namely Chakra Kunda is believed to have started from the weapon of Vishnu, Chakra. There are shrines dedicated to Chakranarayana, Ganesh, Rama, and Lakshman in the temple.
This place has also been visited by Sankaracharya and the famous poet, Surdas resided here. Sage Suta (or Maharshi Suta), the author of 18 puranas is believed to have lived here and presented his sayings to the sages. The central deity is believed to have presided over the forest and hence the puja (rituals) are done to the forest.
The temple is counted as one of the eight temples of Vishnu that self-manifested and is classified as Swayamvyakta Kshetra. Seven other temples in the line are Srirangam Ranganathaswamy temple, Bhu Varaha Swamy temple, Tirumala Venkateswara Temple, and Vanamamalai Perumal Temple in South India and Saligrama, Pushkar and Badrinath Temple in North India. Naimisaranya temple is revered in Nalayira Divya Prabandham, the 7th–9th century Vaishnava canon, by Thirumangai Azhwar in ten hymns. The temple is classified as a divyadesam, the 108 Vishnu temples that are revered in the Vaishnava canon.
Every new moon day, a large number of people purify themselves with a dip in the holy well. If the new moon falls on a Monday, it is believed that a holy bath in the well and offering to the presiding deity Lalitha will wash away all the sins committed in their lifetime.
As told in another legend, when sages were planning to perform penance, Brahma, the god of creation, brought out a ring from darba grass. He asked the sages to perform penance at the place where the ring fell, which is believed to be Naimisaranya. The sages performed penance and at the end of it, Vishnu appeared to the sages and accepted their offerings. It is believed that the forest still has Vishnu and all sages as trees.