We had 2 stays in New Delhi: the first for Diwali and the second for a wedding.
Our flight was to Kolkata, and we only found out later that Diwali is only heavily celebrated in Delhi and Mumbai, so we booked a train ticket to Delhi. The journey was scheduled to last 30 hours and was delayed by 10 hours, for a total 40 hours in the train. The train ride was comfortable and mostly uneventful, except for the chai-wallahs waking us up with their calls of "chAI chAI chAI" through the night and for the fact that I became an instant celebrity when I pulled out my laptop: all the kids on the train then crowded around us to see travel pics.
At our first experience in Delhi the guy at the prepaid taxi stand tried to steal 400 rupees from us: I gave him a 500 Rs bill, he put it in the register, took out a 100 from the register, and said I only gave him 100. I then gave him a 500, and after counting my 500s I realized I had originially given him a 500. We confronted him on it, and he gave us back the difference except for 100. We confronted him on that, and he gave us back the last 100. The thieves are shameless and are also fearless of losing their jobs.
There are vegetable and fruit markets everywhere
A lot of swastikas, which is especially unexpected so shortly after leaving Europe. It seems the 2 main symbols in Hinduism are the swastika and the star of David, an odd contrast.
The Lotus temple, belonging to the Bahai religion. This religion is 150 years old, and spreads the word by building temples of a scale and design to make them landmarks.
India gate - a gate leading to a street that leads to Parliament and military buildings, and is surrounded by an oasis of green space in a city that doesn't have much plant life.
Qutb and Qutb Minar are a complex in ruins and a spire, in the Mehrauli area in Delhi where Islam was first established in present-day Northern India, a thousand years ago.
A Hindu temple complex
Cows are everywhere on the streets. This guy keeps them clean.
We returned to Delhi 10 days later for a friend's friend's wedding (same friend whose parents graciously let us stay with them, which was wonderful) - which was great as we (Sue especially) had been wanting for years to go to an Indian wedding.