The significance of Goldy Pond in "The Promised Neverland" lies in its portrayal of the children's resilience and bravery in the face of oppression. It serves as a turning point in the series where the children not only uncover the grim truth about their situation but also decide to take a stand against their captors. The story arc set in Goldy Pond highlights the themes of survival, sacrifice, and the unwavering will to fight for freedom, making it a pivotal and impactful location in the manga series.