In Nehru's opinion, what were the temples of modern India?

Largescale Dams.

Nehru said that "Our engineers tell us that probably nowhere else in the world is there a dam as high as this. The work bristles with difficulties and complications. As I walked around the site I thought that these days the biggest temple and mosques and gurdwara is the place where man works for the good of mankind. Which place can be greater than this, this Bhakra Nangal, where thousands and lakhs of men have worked, have shed their blood and sweat and laid down their lives as well?"