No image availableTunnel Number 33Tunnel Number 33, also known as Barog Tunnel, is the longest tunnel on the UNESCO World Heritage Kalka-Shimla Railway at approximately 1,143 meters. Located near Barog Railway Station in Solan district, this historic railway tunnel was completed in 1903 and represents a significant British colonial engineering achievement in the Himalayan foothills.Barog, Himachal PradeshHeritage Site