Another thing quite surprising for a European is related to security measures. Due to the tensions between Pakistan and India, the security measures are stricter than any I've never experienced before. Each individual (and his luggage) is scanned when he enters metro stations, malls, hotels, stadiums, etc. We travelled around Delhi, Noida or Agra area by car. The car gets checked as well for potential bombs. A bomb check looks like this. During the night is a bit creepier. First 2-3 days you feel a little uncomfortable but after that you kinda get used to it. Traffic is completely chaotic. There are no rules except honking. Honking is not a sign of impatience or aggressiveness, it just means "I'm coming". Minor collisions are common but no one wants to waste any time if they happen. People just keep on driving and mind their own business.
In my case, business trips and workshops are always exhausting. My time is occupied with sketching, wireframing, prototyping and client discussions. It rarely happens that I have a few free hours and India was no exception. Still, after a full week of work we had a free Saturday before taking the plane back. Agra is about 3 hours away from Delhi, so seeing Taj was a must.
Taj Mahal is not impressive in its size (actually the tomb room is relatively small), but for its finest decorations, calligraphy, reflective tiles and the designs in marble. The level of detail and craftsmanship is mind blowing.