As mysterious and maybe bizarre or interesting (depends on your opinion) as this site looks, there’s some kind of explanation.

When something like this happened before, it was on a high school football field. The field had a bursted pipe which caused water to get into a crevice and collected between the sod and the soil. However, it’s not clear how this nature’s water balloon in this little-known site in Njoro, Nakuru County came about. Our advice is let’s bounce with caution.

Via: https://www.instagram.com/atinkanews/