The image is a photograph of a plaque on a white wall. The plaque is rectangular in shape and has a dark brown background. On the top of the plaque, there is a text that reads "Prime Meridian" in white capital letters. Below the text, it reads "Zero Degrees Longitude East West". In the center of the text is a black circular design with a cross in the middle. The design appears to be made of metal or a similar material.