This is an unusual picture – it's a radar image. You need to look carefully to interpret what's there.
The Mediterranean is easy to pick out, and Barcelona is a major seaport, so you can find it on the right. There is another city centre-left, which is Lleida. To the south of Lleida is part of the Ebro River. The dark water is prominent as dams back up the water flow. It eventually empties into the Mediterranean, but the Ebro Delta isn't in the picture. The rugged-looking area at the top of the image are foothills of the Pyrenees. Blue-green areas on land are cultivated areas.