Explanation:

• The Railways have started the country’s first glass-topped vistadome train on the 115-year-old UNESCO World Heritage Kalka-Shimla route. The train — Him Darshan Express — with seven see-through coaches (six first-class AC vistadome coaches and one first-class coach), was flagged off from Kalka at 6.55 am and reached Shimla at 12.25 pm while briefly halting at Barog.
• The highlight of the journey is Barog station, which has the longest tunnel (tunnel 33) on the route, stretching 1,143.61 metre. Also, bridge number 226 is an architectural marvel that passes over a deep valley surrounded by steep hills on both sides. 
• The Britishers laid the first rail track to connect Shimla in 1903. In 2009, the Kalka-Shimla rail track was declared a world heritage site by UNESCO. An incredible feat of engineering, 94-km railway track with 18 stations en route was built in 1903 and covers staggering 102 tunnels, 864 bridges and 919 stunning curves.