Built in 1585 and named after its builder Savai Raja Man Singh of Amber, now Ajmer, Man Mandir Ghat was earlier known as Someshwar Ghat. An observatory was also set up here by Maharaja Jai Singh in 1730s. He was the same raja who built the famous Jantar Mantra at Delhi and Jaipur.
The observatory is fitted with excellent window castings. It has four astronomical instruments, which are still in good shape and throw a great light on the state of the knowledge of astronomy in those days. The observatory was renovated in 1850 and again in 1912 by the Rajput rulers of Jaipur
Man Mandir Ghat boasts of several important temples such as Sthuladanta Vinayaka, Rameshwara and Someshwara temple. The latter has a Someshwara Lingum which is a replica of its counterpart in Somnath Temple in Gujarat. It is believed to be one of the nine famous Jyotirlingams in India.