Ujjain is famous for its Mahakaleshwar Temple. The temple enshrines one of the twelve Jyotirlingas. The lingam of the temple is considered as Swayabhu (itself born).

Ujjain is known as City Of Temples

Historically the city is associated with Emperor Ashok, Chandragupta Vikramaditya, Raja Bhoj, Rudradaman, the Delhi Sultans, Mandu Sultans, Holkars and the Scindias. The throne of Maharaja Vikramaditya, known as the "seat of judgment (salabanjika throne)"

Other famous ujjain Temples (ujjain darshan places) worth watching are
Bhartrihari Caves (Bhartrihari Gufa)
Sandipani (Shri Krishna's Guru) Ashram
Chintaman Ganesh Temple
Harsiddhi Mata Temple
Gadkalika Temple
Mangal Nath Temple
Navgarh Shani Temple
Kshipra River
84 Mahadev Temples