Yeah ! I was riding along the track in the local forrest, suddelny i heard a noise sound like an old watermill. I stopped and get closer to it and found an wonderfull piece of engineering! It is a waterpump developed by the french inventor Joseph Montgolfier in1796.
This Pump moves 3 liters/sec just by using the flowspeed of the Water which flows downhill. Enjoy !
I love the sound of it