12 jyotirling mane jate hain .....Kedarnath, somnath Vaidyanath, Rameshwarm, Maha kaleshwar,Bhimshanker, Traymbkeshwar,Nageshwar, sree sailam,Grishneshwar omkareshwar & Vishwanath.

Worship of shivalinga is considered the prime worship for the devotees of Lord shiva. Worship of all other forms is considered secondary. The significance of the shivalinga is that It is the resplendent light (flame) form of the Supreme - solidified to make the worship of It easier. It represents the real nature of God - formless essentially and taking various forms as It wills. The purANas like shiva mahA purANam discuss about the sup It is believed that Shiva first manifested himself as a Jyotirlinga on the night of the AADRA Nakshatra, eriority of li.nga worship.
The names and the locations of the 12 Jyotirlingas as per Śatarudra Saṁhitā,Ch.42/2-4).
1. Somnath ,It is located at Prabhas Patan in Saurashtra in Gujarat.
2. Mallikārjuna, also called Śrīśaila, is the name of the pillar located on a mountain on the river Krishna. Srisailam, near Kurnool in Andhra Pradesh.( Adi Shankara composed his Sivananda Lahiri)
3. ...more

There are twelve jyotirlingas of Lord Shiva in India. They are: Kedarnath (Uttaranchal), Varanasi (Uttar Pradesh), Vaidyanath (Jharkhand), Srisailam (Andhra Pradesh), Rameshwaram (Tamil Nadu), Bhimahankar, Ghrishneshwar, Trimbakeshwar (all in Maharashtra), Somnath, Dwarka (both in Gujarat), Omkareshwar and Ujjain (both in Madhya Pradesh).