Final answer:
The southernmost point of Great Britain in Cornwall is Lizard Point, a notable geographical location and tourist destination known for its scenic beauty.
Step-by-step explanation:
The southernmost point of Great Britain in Cornwall is known as Lizard Point. This fascinating coastal feature is not only a notable geographical location but also a popular tourist destination, offering breathtaking views and a unique natural environment. While the photo provided talks about the Greenwich Meridian, which is related to longitude, Lizard Point is significant for its latitude, marking the most southerly location on the mainland of Great Britain. Travelers and geography enthusiasts often visit this part of Cornwall to experience its stunning scenery and historical significance.