Other Observatories
In all, between 1727 and 1734, Jai Singh II, built five similar observatories, Yantra Mantras, in west central India, all known by the same name, thus includes ones at Jaipur -Yantra Mantra (Jaipur), Ujjain, Mathura and Varanasi. Today the observatory is mainly a tourist attraction, and is significant in the history of astronomy.
Read more about this topic: Jantar Mantar (Delhi)