The architectural astronomical instruments of 18th century Rajasthani king named Jai Singh contained in an amazing, three-storey-high complex known as Jantar Mantar. Open daily from 9 am to 4:30 pm, the Jantar Mantar is equipped with futuristic scientific instruments and is the best among the five observatories pioneered by Maharaja Jai Singh II, Newton of the East .
