Asia's most luxurious train Maharaja's Express provide a 8 day circuit journey from New Delhi to Mumbai. The luxury train is intended for holiday trip and sightseeing throughout the journey.
The main places covering are Delhi, Agra, Ranthambore, Jaipur, Bikaner, Jodhpur, Udaypur, Balasinor and Mumbai. The train halts at all these places and one can get enough time for exploring those places of interest completely.
More about Maharaja's Express, it's destinations and rates for journey and other services can be found here. https://www.maharajas-express-india.com/indian-splendor.html