SHIMLA
UNESCO World Heritage line since 2008, running since 1903, with 100+ tunnels. Book the Rail Motor or Vistadome coach for window views — regular second class windows are barred and grimy. Verify departure times on IRCTC same-week, they shift seasonally.
The 96-km narrow-gauge Kalka-Shimla Railway was built between 1898 and 1903 under engineer Herbert Septimus Harington to connect the summer capital to the plains rail network, opening on 9 November 1903 and dedicated by Viceroy Lord Curzon. The line traverses 102 active tunnels, 969 bridges, and 912 curves, including the world's longest tunnel at the time (Barog) and the multi-arch Kanoh viaduct, remarkable feats of colonial-era engineering on a steep 1:33 gradient. UNESCO inscribed it as a World Heritage Site on 8 July 2008 under the Mountain Railways of India designation.
