"Jantar Mantar" these two enchanted and puzzles words droning in India by many individuals in their youth to satisfy their supernatural dreams however these words are more than that. The expression "Jantar Mantar" actually signifies "instruments for measuring the agreement of the sky". In Jaipur city there are royal residences, sanctuaries, greenery enclosures and lakes they all have their significance in their place however the cosmic observatory set up by the ruler Sawai Jai Singh have International significance. The Jantar Mantar houses different design and prophetic instruments that have gotten the interests of cosmologists, history specialists and planners around the globe. It is thought to be one of the biggest observatories at any point constructed.