He has travelled the world in the line of royal duty, taking in the planet's most spectacular scenery in a lifetime of overseas tours, charity trips and private holidays.
All the while, the Duke of Sussex has been recording the sights on camera, he has disclosed, as he shares a series of photographs from his previously-unknown hobby.
The Duke, who is expected to increase his focus on conservation work in the coming years, has released eight pictures on Instagram as he and the Duchess urge the public to "learn about, celebrate and continue to safeguard our planet, our home".
In a 351-word caption marking #earthday, the Duke and Duchess told their 4.9m social media fans: "Every one of us can make a difference, not just today but everyday."
Fans have noted that the Sussexes are increasingly embracing their ability to control the release of "unseen" pictures on Instagram to highlight their work, writing in-depth captions about charities and detailing previous endeavours behind-the-scenes.