The Hydropolis - Centre for Ecological Education in Wroclaw, Poland, is a unique venue dedicated to the promotion of knowledge about water and its critical role in our world. It is housed in a 19th-century underground clean water tank, which has been renovated and repurposed as a modern educational centre. The history of Hydropolis dates back to the late 1800s, when the building served as a crucial part of Wroclaw's water supply system. With the passage of time, the need for a larger, more efficient water system rendered the old tank obsolete, and it was decommissioned in the 1970s. Years later, the city of Wroclaw envisioned a new purpose for the historic structure, transforming it into a beacon of ecological education, and thus, in 2015, Hydropolis was born. Hydropolis captivates visitors with its exterior that seamlessly blends history and innovation. The brick facade of the old water tank is still visible, giving a nod to its historical roots, while the large glass panels and modern architectural additions reflect its renewed purpose. Inside, the centre covers an area of 4000 square meters, filled with interactive exhibitions, multimedia presentations, and hands-on displays, all dedicated to the theme of water. The exhibits are divided into eight thematic zones: The Planet of Water, The Depths, The Non-Obvious, Man and Water, The History of Water, Technology, The Future, and Kids Hydropolis. Intriguing facts about water, from its chemical properties to its role in human history and its significance in different ecosystems, are presented in a captivating, accessible manner. Visitors can learn about the water cycle, the importance of water conservation, and the challenges of providing clean water to communities around the world, among many other topics. Hydropolis is not just a museum, but a centre for ecological education, promoting knowledge and awareness about one of the most crucial elements of life on Earth. It's a testament to the city of Wroclaw's commitment to sustainability and education, and a must-visit for anyone interested in exploring the fascinating world of water.