These astronomical instruments were built in 1734 by Sawai Jai Singh II, the founder of Jaipur.
Quite incredible structures.
There are 5 such monuments scattered throughout India: Jaipur, Mathura, Delhi, Ujjain, and Varanasi.
This is the largest one.
This is very much like visiting a modern sculpture park
Nadivalaya
There are a pair of these facing north and south.
They represent the Earth's two Hemispheres.
It's a UNESCO World Heritage site.
There are 19 instruments in total.
These super sized monuments allow observation of astronomical positions with the naked eye.
Brihat Samrat.-- possibly the largest sundial ever built. Its 23m high. Apparently, it has an accuracy of 2 seconds.
The ramp of this sundial points towards the North Pole, hence Jaipur
time can be easily calculated from the position of ramp’s shadow on the
fine divisions of the carved scale. It calculates time up to the accuracy of twenty seconds.
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Jaya Prakash Yantra
These two marble hemispheres detect elevation, azimuth and hour angles.
Ram Yantra
It measures the elevation and azimuth of the Sun and planets
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