The story behind the Trans-Iranian Railway, one of the greatest engineering feats of the 20th century

It may not be as long or as well-known as Russia's iconic Trans-Siberian Railway. But international recognition is long overdue for the 1,394-kilometer (865-mile) Trans-Iranian Railway. On July 25, the railway was one of 33 new sites awarded World Heritage status by the United Nations Educational Scientific and Cultural Organization (UNESCO), joining world famous locations [...]