Jantar Mantar

Jantar Mantar in Delhi, Uttar Pradesh is the unique observatory built by Rajput King Sawai Jai Sing 1 in 1724. It consists of a massive sundial and other instruments for observing the movement of planets and other celestial bodies. The construction seems unusual but the structures and scientifically devised instruments most suitable for the observation of sky in the absence of telescopes.There is a strange collection of huge masonry instruments like Samrat Yantra, Misra Yantra, Ram Yantra and Jai Prakash Yantra. In 1948 jawaharlal Nehru declared Jantar Mantar a National Monument.