Some best train routes
Jalpaiguri to Darjeeling where u get to see awesome Kanchenjunga ranges and lavishing tea gardens.
Mumbai to Goa for tunnels and bridges
Kanyakumari to Trivandrum for architecture, beaches and rivers
Jodhpur to Jaisalmer for the spread desert and sunrise.
Darjeeling Himalayan Railway (New Jalpaiguri-Darjeeling) - People come from different parts of the world to visit Darjeeling just for a joyride on this narrow gauge railway track, which is listed in the UNESCO World Heritage Sites list. The toy train chugs its way across beautiful mountains and offers jaw-dropping views of Mt Kanchenjunga.
It's my personal experience and after checking from https://openingtoclosehours.com/ study. The Gatimaan Express is one of the fastest train in India and has the greatest operational speeds as of 2022, with certain sections reaching 160 km/h (99 mph), while the Vande Bharat Express is the fastest train in India and has the fastest top design speed of 180 km/h (110 mph).