The prime meridian is located at the Royal Observatory. You can stand astride two hemispheres here, which represents the Prime Meridian of the World – Longitude Zero (0° 0′ 0″).
Every place on earth is measured by it’s distance east or west from the Greenwich Meridian. The arbitrary north-south line divides the eastern and western hemispheres of the earth, just as the Equator divides the northern and southern hemispheres.
For us to get to the Royal Observatory, it’s quite a walk from the Cutty Sark especially going uphill. A slow and relaxing walk through Greenwich park will take about 30 minutes. Once up there, we’ll be rewarded with a spectacular view overlooking Canary Wharf as well as the O2 arena. This is another of London’s photo spots especially for those with telephoto lenses.