https://www.cornell.edu/video/playlist/jantar-mantar-the-astronomical-observatories-of-jai-singh-ii
Jantar Mantar: The Astronomical Observatories of Jai Singh II - Cornell Video
Visit the 18th century astronomical observatories built by Maharajah Jai Singh II in Jaipur and Delhi, India.
jai singh iijantar mantarastronomical observatories