Sun Dialing the Skies at Jantar Mantar in Jaipur | India
Situated within the old city of Jaipur near the City Palace and Hawa Mahal is the UNESCO World Heritage Site of Jantar Mantar. Named after the words "yantra", which in Sanskrit means "instrument", and "mantrana" meaning "to calculate", the Jantar Mantar is an equinoctial sundial that measures the time of the day and the declination of the sun and the rest of the celestial sphere.