It has been declared a world heritage site by UNESCO. Even the construction of its railway track is splendid that climbs from sea level to about 7400 ft high. This enchanting journey takes the travelers through wonderful vistas of nature, some them are really incredible. There is no tunnel on the way. So, the railway line has some very sharp curves passing through takes breath away. However, this journey is delightful with almost all facets of nature being available to cheer with.