It's very common to see these water ditches in the Netherlands, since 1/3 of the country is below sea level. Land rescued from water is called a polder: https:/

It's very common to see these water ditches in the Netherlands, since 1/3 of the country is below sea level. Land rescued from water is called a polder: https://en.wikipedia.org/wiki/Polder https://en.wikipedia.org/wiki/Polder