When I started to learn about GR, I have been thinking, that there is simple relation to gravity and time dilation, that higher gravity means bigger time dilation. But later thanks to PF discussions I learned time dilation is related to gravitational potential and not directly to gravity. But I have still major problem to understand and accept that the highest time dilation is for example in center of Earth where is zero gravity. I was looking for experiments and astronomical observations but all experiments I have checked have been showing than higher gravity means bigger time dilation. I wonder if anybody knows of any experiment or astronomical observation which would show a case where lower gravity means bigger time dilation.