Ujjain is one of the holiest and oldest cities of India and was an important place during the reign of Ashoka in spreading Buddhism. Famous for its Jyotirlinga shrine at Onkareshwar. It is one of the seven sacred cities of India. Once in 12 years, the mammoth KUMBH MELA festival is held at
Ujjain in Madhya Pradesh
. The ancient shrine of Mahakala is among its attraction .