By implementing “Heritage and Green Horizons,” we wanted to create a Youth Exchange that went beyond discussing climate change only as an environmental issue. Our main goal was to help young people better understand how climate change was deeply connected to history, culture, tourism dependency, inequality, and economic systems, especially in fragile island contexts such as Sint Maarten. We aimed to create a learning experience where participants could explore these connections not only through non-formal workshops and discussions, but also through direct contact with local realities, communities, and organizations on the island. Through study visits, outdoor activities, simulations, intercultural dialogue, and non-formal education methods, participants were encouraged to reflect critically on the relationship between sustainability, colonial legacies, economic dependency, and social inequalities. A second major objective was to bridge the gap between European mainland youth and young people from Overseas Countries and Territories such as Sint Maarten. During the preparation phase of the project, we realized that many participants from Europe had very limited awareness of the Caribbean parts of the Kingdom of the Netherlands and of the realities faced by youth living there. At the same time, local young people from Sint Maarten often expressed feeling disconnected or overlooked within the broader European context. The project therefore aimed to create genuine intercultural exchange and stronger mutual understanding between these different realities. Another important objective was to strengthen participants’ sense of active citizenship and personal responsibility. We wanted participants not only to learn about sustainability, but also to reflect on their own behaviors, lifestyles, and role within society. Through activities focused on advocacy, dissemination, and group leadership, we encouraged young people to become more proactive, socially aware, and engaged in their own communities after returning home. The project also aimed to strengthen practical skills such as teamwork, intercultural communication, critical thinking, facilitation, adaptability, and initiative-taking. Because the project relied heavily on participant involvement and experiential learning, participants were encouraged to actively contribute to discussions, group activities, dissemination efforts, and intercultural exchange throughout the mobility. All of these objectives were strongly aligned with the wider goals of the Erasmus+ Programme and Youth Exchanges. The project promoted non-formal learning, intercultural dialogue, inclusion, active citizenship, participation of young people, and European cooperation, while also creating space for participants to develop personally and socially through direct experience. The exchange especially reflected the Erasmus+ priority of participation in democratic life and engagement, as participants were not passive attendees, but active contributors throughout the entire process. One of the most important aspects of the project was that it was truly a project developed by young people for young people. Young people from all partner organizations actively shaped the project from the very beginning until the final stages of dissemination and reflection. Participants contributed ideas during the preparation phase, facilitated activities during the mobility, created social media and dissemination content, supported group discussions, and later contributed reflections and insights that were included in the final dissemination materials and this final report itself. At organizational level, the project aimed to strengthen cooperation between the partner organizations from the Netherlands, Sint Maarten, Croatia, Spain, and Romania, while also building stronger connections with local stakeholders and community organizations on the island. The project helped create new partnerships and gave all organizations valuable experience in implementing an international Youth Exchange in a geographically and logistically complex context. Overall, our objective was not only to organize a mobility activity, but to create a meaningful educational experience where participants could better understand the social dimensions of climate change, experience intercultural cooperation in practice, and leave the project with greater awareness, empathy, and motivation to contribute positively within their communities.