ODRA Centrum is a modern NGO based in Wroclaw, Poland which main concern is Odra river which flows through the city. ODRA spreads knowledge about history of Wroclaw and Odra and organizes social life around the river. They also build the first in Poland floating house on the water. 

Odra's mission is clear as clear should be a river -  be a place that spreads knowledge about the river and brings new social life around it.