The ‘Demodara Loop’, is a popular tourist attraction due to its spiral railway line. The railway line goes under them, goes around the hill and emerges from a tunnel that runs directly under the Demodara railway station. The rail loop is approximately 900 m (3,000 ft.) long and the tunnel is 320 m (1,050 ft.) long. It is considered to be the only roundabout in the world with a train station located exactly on a spiral tunnel. During the construction of the railway extension to Badulla, engineers and surveyors found that the elevation between the Demodara Hills was too high to negotiate and that the maximum slope allowed by the Ceylon Government Railroad was 44 feet (1/44). ), Had to create an innovative track design.

According to local legend, one of the engineers, Devapura Jayasena Wimalasurendra, was inspired after removing the thalappa (sumbara) from a kankani (supervisor) in a tea estate in the area and tying it back on his head.