At the start of second year computer science, we were taught the concept of image stitching. There’s a lot of complicated maths involved, but it was understandable, and more importantly, interesting. Turns out my lecturer had previously contributed to the panorama stitching feature in Windows Live Photo Gallery. He’s even got an app!
Anyway, before I had those lectures, I was still using the tool to stitch photos together. When I went to Venice with the 6th form in 2010, I took a burst of photos from the top of a tower overlooking most of the city.