A gravity hill is a place where a slight downhill slope appears to be an uphill slope due to the layout of the surrounding land, creating the optical illusion that water flows uphill or that a car left out of gear will roll uphill.

Where in the world does water flow up?

Watersheds and rivers

In practical terms, water generally seeks to flow to the oceans, which are at sea level. So, no matter where on Earth water is, it tries to flow downhill. Because the Earth is not a very level place, water ends up occupying the valleys and depressions in the landscape as rivers and lakes.

Which river flows up hill?

So if you define “uphill” as “a direction that takes you farther from the center of the Earth“, then yes, you could say the Mississippi flows uphill. But that definition only agrees with the normal definition of “against the pull of gravity − centrifugal force” on perfectly spherical non-rotating planets.