Shimla, Dec 27 - The Northern Railway has started four special trains on the world heritage Kalka-Shimla rail line in Himachal Pradesh to cater to the tourist rush during the New Year's eve celebrations, a railway official said Sunday.

"Four special trains have been started to cater to the tourist rush to the hill station Shimla. These trains are in addition to five regular trains," Station Superintendent J. S. Rajput told IANS.

He said the special trains would ply to and fro between Shimla and Kalka in Haryana till Dec 31.

The century-old Kalka-Shimla railway line was selected by the UN Educational, Scientific and Cultural Organisation as a world heritage site.

The scenic journey along the 96-km-long narrow gauge railroad from 640 metres above sea level at Kalka to Shimla at 2,060 metres attracts large number of tourists every year.  (IANS)