Ramanujan always amazes me. Remembering my visit to the Ramanujan Museum in India, which treasures the pictures, letters, and documents focusing the greatest mathematician of the 20th Century:
If you are looking for tech, you could check at my special tech events coverage including "CTO Talk" event Walmart Labs India, Snapdeal, ThoughtWorks with slide photos at:
https://casualwalker.com/museum-for-the-man-who-knew-infinit...