Hozugawa river boat ride
https://gyazo.com/1dafe2b3b0908204baaebdd905457e41
N35.0144954,E135.5857114,Z14 Hozugawa+River+Boat+Ride+(Hozugawa+Kudari)
Following roughly the same path of the Sagano scenic train you can take a boat ride through the Oi (hozu) river valley. It's particularly nice in the fall when all the Maple leaves turn into their many colors.