Enthusiasts continue to explore the amazing world of modding with the help of The Witcher 3's toolkit. For instance, user MerseyRockoff managed to bring back a quest chain involving regatta races that was cut from the final version.
The Boat Races modification allows you to engage in sailing sport and become a true medieval yachtsman. Interestingly, the author restored not only the quests and journal entries but also full voice acting — it's available only in English, but apparently, there are other languages as well. You can download the mod here.
Before this, enthusiasts discovered a cut ending involving Yennefer's betrayal in the game's files.