Recently, I was on one of my rare visits to Delhi & I had my camera with me. So I could not resist going to Jantar Mantar on Sansad Marg in Delhi to take pictures for my collection.
The first difference which struck me was the red color. The instruments are all colored in red. The Jantar Mantar in Jaipur is colored in Royal Yellow. The other thing which struck me was that the visitors were all over the monument’s various instruments made of masonry. This really should be discouraged.
Jantar Mantars were a brain child of Maharaja Sawai Jai Singh of Amber & Jaipur. These were stone astronomical observatories made of masonry and marble etc. so that they would give very accurate readings of the heavenly bodies. Precise calculations of the movement of the Zodiac, Sun, Moon & Stars was required because all facets of an Indian’s life are governed by them. Furthermore Sawai Jai Singh found the tables in use then to have several discrepancies because of various reasons one of which was that the astronomers were using metal instruments of smaller sizes. So he decided to make huge instruments, in masonry no less, at several locations across India so that he could get the most accurate readings. The observatory in Delhi was made in 1724. It has been ruined & repaired several times. Till 1958 AD, the Sawai, the flag of Jaipur state used to fly here. In 1958 the monument was taken over by the ASI.
The image of the central part of the ‘Misra Yantra’ was used as the logo of the 1982 Asian games held in Delhi.
These are some of the pictures I clicked.
I like that pink rain Lilly Flower image very much. Other images are also very interesting to see. Thank you very much.
Construction and creativity are the great pyramid of Egypt, Jantar Mantar is the best for young people to visit.
you have shared very useful information ,which is helpful for visitors, great work, keep it up
and great pics also 
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If you want to know more about Jantar Mantar,click below mentioned link:
http://www.ijaunt.com/delhi/jantar-mantar.