This slice of Prague is part of an image unlike any ever assembled: the world’s largest spherical panoramic photo, 192,000 pixels wide by 96,000 pixels high, some 18.4 billion pixels in total, weighing in close enough to 20 GB to make the jaw drop. To put it in analog terms, it would be 16 meters long on actual photographic paper. By clicking here (or on the image above) viewers can zoom in and out and rotate from the city’s television tower height to a voyeuristic maximum.