A route being explored is Delhi-Kolkata wherein Agra, Varanasi, Khajuraho, Gaya could be covered
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/railways-put-track-its-own-luxury-train
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rail-transport
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tourism
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gaya-d
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi