Besòs

Besòs is a river in Catalonia, Spain. It originates in the Montseny Massif and flows southwards for approximately 70 kilometers before emptying into the Mediterranean Sea in Barcelona. The river's course passes through a densely populated metropolitan area, significantly impacting its ecological state and urban landscape. Historically, the Besòs played a vital role in agriculture and industry for the region. However, over centuries of development, it suffered from pollution and extensive channeling.

In recent decades, significant efforts have been made to regenerate the Besòs river basin. This includes extensive environmental cleanup initiatives, the creation of green spaces along its banks, and the development of recreational areas. The river's transformation from a polluted industrial waterway into a more integrated urban ecosystem is a notable example of urban environmental recovery. The Besòs estuary is part of the Besòs-Maresme Metropolitan Park, a protected natural area that supports diverse flora and fauna. The river continues to be an important feature of the Barcelona metropolitan area, serving both ecological and recreational functions.