Can You Find the X? Photographer’s Gigapixel Images Contain Hidden Code

A promotional campaign has used a photographer’s gigapixel images to hide an X containing a code that could win you a cruise.
Celebrity Cruises teamed up with panoramic photographer Will Pearson who runs Eye Revolution to create five enormous pictures that each contain four billion pixels.
Each image is of a popular European holiday destination: Athens, Greece; Barcelona, Spain; Florence, Italy; Santorini, Greece; and Dubrovnik, Croatia.
Update on 3/30/26: The embedded images have since been removed from the Internet.
The massive amount of detail contained within each image means that users will have shift through a lot of pixels to find the Xs that each contain a unique code. However, for those who persevere, there is a chance to sail onboard the luxury cruise ship Celebrity Edge.
For more, head to the competition’s website. Click on this link for the mobile phone interactive version.
More of Pearson’s work can be found on his company’s website and personal website.
Update 1/31: This update is to clarify that the Barcelona image was actually taken by Alexander Reznik and not Will Pearson.
Image credits:Photos by Will Pearson.