If the gravity would be a well, this is how it would look like in the solar system - a very nice way of visualising the differences of gravity in the planets of our solar system. Zoom in for better view.

Each well is scaled such that rising out of a physical well of that depth, in constant Earth surface gravity, would take the same energy as escaping from that planet's gravity in reality. Each planet is shown cut in half at the bottom of its well, with the depth of the well measured down to the planet's flat surface.

If you want even bigger resolution, click here.