琵琶湖から京都までの疎水路（主に農業用水）を、下った船を引き上げた貨物列車用の線路跡地。
列車は廃止されていますが、この水路の水は京都の庭園などに今も利用されているらしいです。

This is the site of the railroad tracks used by freight trains to bring up ships that went down the canal (mainly agricultural water) from Lake Biwa to Kyoto.
Although the train has been discontinued, the water from this canal is apparently still used for gardens in Kyoto.