I was in Chennai in last weekend and till Monday (11th Aug) due to some official work. The place I had to visit was Thiruvanmiyur.
I was in Chennai when I was about to start my earnings, and the impression I had about Chennai from then, had to be slightly modified seeing the current infrastructure..
This picture shows the station for the metro train which runs on rails above the ground.
I got into the station and what you can see is the huge space under the station. This snap is me taking snap exactly beneath the station.
This is a view from inside the railway station..