Since ancient times, when there was no electricity, people still had fountains. So have you ever wondered how these fountains work? Scientists back then utilized the concept of gravity to channel the water from a place of low pressure to the place of higher pressure. You may not know but even the smallest height or elevation could provide just the right amount of pressure to water which works perfectly for the fountains.the former societies that had no electricity enjoyed the fountains in this way and researches showed that the people of Maya may have used them as well. The river waves and currents are also a practical implementation of gravity. The King LouisX14 ordered the fountain system which contained 14 huge wheels utilizing the water of the river Seine

https://www.nytimes.com/2015/01/20/science/electricity-free-fountains.html.