This picture shows Mansagar Lake in the background, with pillars in the foreground. These pillars belong to an old unfinished building structure in red color stone and are located on Nahargarh hills. The structure doesn’t have a roof.
No information regarding purpose etc is available for this structure. However, it is possible that this was a viewpoint for Mansagar Lake! It’s a great place to sit, soak in the view and enjoy some peace. Do avoid Sunday, though!
If you want to know more about Jal Mahal or the water palace in Jaipur, Read this post – Inside Jal Mahal