The answer is London, United Kingdom.
The Prime Meridian line passes through the Northern Hemisphere and it covers the following countries:
The United Kingdom, France, Spain, Algeria, Mali, Burkina, Faso, Tongo, and Ghana while in the Southern Hemisphere, passes through Antarctica.
Prime Meridian line divides the Earth into two divisions. It directly passes through the land of Greenwich in England. It consists of 180 longitudes lines on every side of the Prime Meridian.
Imaginary lines of the Earth: