To showcase the Sony Xperia Z1—featuring the world’s best camera in a waterproof smartphone—we set out on a global adventure.

Explorer Ed Stafford uncovered four Hidden Wonders of the World, and we dispatched Z1 devices to these remote, underwater locations, pushing the phone to its very limits.

Each day, content captured on the Z1s gave followers tantalising clues about their whereabouts. The challenge? Guess the locations by dropping a pin on Google Maps. A campaign that blended exploration, technology, and mystery—inviting people to join the journey.