Passenger railway in Kamakura, Japan. These rails are called Type 37kg (a finer and high quality type of rail), and come in lengths of 25m. A length of new rail costs about $920 and the complete line uses about 808 of them. The line is the famous Enoden. 
A lenght of straight rail lasts 30 years and a curved one 10 years. When they are exchanged they are left by the rail as in this photo, to be picked up once a year all at the same time. They are sold as scrap iron generating about $200/piece. Some're sold as tourist souvenirs.
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