Ventured out to Greenwich today and had a wander up to the Royal Observatory. To my surprise, since I’m not a history/science buff, I discovered the Prime Meridian Line. Plus, they have a camera obscura. All for Free.
First image is of the sundial sculpture on the line. The second is of the clock that documents the official time. Although it looks like a quiet place there were dozens of folks standing on the line taking photos. Okay, I'm still a tourist.