The exhibition titled 'On the Big River' at the International Youth Library in Blutenburg Castle highlights the vital role rivers play in shaping landscapes, marking borders, and serving as symbols in folklore and life’s journey. This collection showcases illustrations from children's books over the past 15 years, featuring works from an impressive array of countries including Australia, Belgium, Brazil, China, Germany, and many others.

Visitors to the exhibition begin their journey in familiar surroundings, where illustrations depicting local waterways and their native fish species adorn the walls. These artworks come from Thomas Müller’s panoramic picture book titled 'A River Journey,' inviting viewers to explore a river's course and appreciate the biodiversity it harbors, such as dragonflies, kingfishers, otters, and local plant life. The exhibition serves not only to celebrate artistic expression but also to educate on environmental themes related to rivers and their ecosystems.

As attendees move through the exhibition, they encounter diverse narratives presented through illustrations, each telling unique stories tied to the cultural and natural significance of rivers in different regions. By incorporating a global perspective on rivers, the exhibition encourages a deeper understanding of how these vital waterways connect us all, weaving together tales of adventure, life, and the environment across cultures.