What I realized when I was exploring Mumbai was this- Sometimes Chauffeurs and Cab Drivers can give you a much faster and better tour of the city than anybody else. They even add historical tit-bits to very small places which makes the trip even more interesting.
Architecture of the Golconda. How were they able to make such long lasting structures many centuries ago? These structures still stand proud and firm (although crumbling in a few places). It’s inspiring to see such design and learn from them.