Delhi has been an intermediate point for a really long time. After 2002 (when I was seven years old), we have never stayed in Delhi for more than a few hours. Before planning this trip, my parents had some things in mind.
Duda always wanted to travel in the Rajdhani express (and it hadn’t happened for one reason or the other). Gunja’s interest in the Mughal architecture had piqued after studying about the era (as a part of the history course).
Hence, Delhi and Agra were chosen.