Before 1815, much of Kandy's territory had been underdeveloped with unreliable dirt-track roads for access, apart from a few 'royal roads'. The British proceeded to transform the hill country by constructing roads across previously inaccessible terrain (such as the Kadugannawa Pass), and, in 1867, building the first railway. The other big transformation was the introduction of tea to central Sri Lanka in 1867 and the massive settlement of Tamils in the region. Central Sri Lanka is now dominated by the vast tea estates that helped make Sri Lanka the world's biggest exporter of tea for a while, and were still owned by British companies in 1971.