Commanding the largest river basin in Spain, the Ebro flows through over 560 miles, passing through flood plains and coastal mountain, carving deep gorges along the way. The river is believed to be one of the best European fishing destinations. Its carp, catfish and zander fish attract tourists in large numbers, and welcome associated activities such as bird watching. Most lodges are located along the banks of the tranquil middle reaches of the Ebro, the more mountainous reaches being difficult to navigate. Boat tours are rapidly evolving into a major tourist activity at Rio Ebro, thanks to recent initiatives by private tourist companies.