The following image is from GSLV-F11 GSAT-7A Mission:
Location: Second Launch Pad (SLP), Satish Dhawan Space Centre, Sriharikota, India.
Please click here in case you want to see the image in ISRO's Website.
In the bottom left corner of the image, there is a peanut-shaped building next to the water tower for the sound-suppression system, which is indicated by a red rectangle.
Another view of the peanut:
The peanut is on the right side, the middle portion of the image.
What is the use of this ground facility? Why is it peanut-shaped? Is that for storing rocket propellant*? What is the advantage of this shape? Are there any other launch sites with such structures?
*On examining the picture closely, the peanut is under construction, so I think it cannot be for storing propellants.