Alajuela, Costa Rica, Deputy Mayor Luna Alfaro explains how his city has benefited from a city-to-city exchange with a municipality from Germany. This perhaps atypical exchange emphasized technical knowledge for the benefit of both cities. Alajuela has received training to improve their water management systems. More such trainings are needed to show local governments around the world that there is a better, more sustainable way. The impacts also goes beyond climate – by working together in city partnerships, it helps cities like Alajuela feel part of a broader movement. Only if cities join forces will they be able to tackle the many challenges they face.