The Jantar Mantar, Jaipur.

The Jantar Mantar in Jaipur, built in the early 18th century by Maharaja Sawai Jai Singh II, stands as a premier astronomical observatory with around 20 monumental instruments, including the world's largest stone sundial, the Brihat Samrat Yantra, which provides highly accurate time readings. This well-preserved site reflects the advanced scientific knowledge and architectural innovations of the late Mughal period, showcasing tools for measuring time, predicting eclipses, and tracking celestial bodies. Recognized as a UNESCO World Heritage Site, it serves as a significant cultural landmark, illustrating the convergence of science and royal authority. The observatory attracts numerous visitors each year, offering educational insights and special events like sound and light shows that highlight its rich history.