Jantar-Mantar of Jaipur –
1. To the east of Chandra Mahal of Jaipur is Jantar-Mantar (observatory) got built by Raja Swai Jai Singh.
2. He also discovered three apparatus known as Samrat Jantara, Jai Prakash Jantara and Rama Jantara. The Samrat Jantara is the biggest and the tallest of all. It indicates accurate time and forecasts weather.
3. This Jantar-mantar has been listed in the World heritage site of UNESCO. Thus it has become the first heritage monument of Jaipur and 28th of the country.
