The Veresk Bridge and the Three Golden Lines, a railway spiral passing three times by the same area at different heights are located in Savadkuh County, Mazandaran Province. They are part of the Trans-Iranian Railway, a major railway building project that started in 1927 and completed in 1938. It links the capital Tehran with the Persian Gulf and Caspian Sea.
The Danish firm Kampsax began constructing Veresk Bridge in 1934. The structure stands at 110m height and has a 66m long arch. It connects two mountains in the Abbas Abad region.
The construction of this bridge included craftsmen of many nationalities. The name of the bridge is derived from the name of a Czechoslovakian technician whose name was hard to pronounce for Iranians. Near the bridge is a memorial for the workers who lost their life while building the bridge and its nearby tunnels. The Chief Engineer, Austrian Walter Aigner, following his wishes, is buried in the local cemetery of Veresk.
During World War II, it was known as the Pol-e-Piroozi, or the bridge of victory. During the course of the war, Reza Shah was asked by Hitler to blow up all tunnels and bridges, including the Veresk Bridge, on Iran’s railway lines in order to delay the transfer of goods and reinforcement troops to the north for the Russians. He furthermore promised to replace and reconstruct all of such demolished structures following the Germans’ victory in the war. Reza Shah rejected the request. Today trains connecting Tehran to Gorgan or Sari pass over this bridge an average of four times a day.
Sources: Wikipedia | Veresk Bridge, Borna News, highestbridges.com, fouman.com, Wikipedia | Trans-Iranian-Railway