Manzanares River
Looking north, this view of the river is from a semicircular "mirador" (lookout point) of the Toledo Bridge. It is very orderly, for the madrileños have walled up the banks very neatly. This river was a very important line of defense for both the Christians and the Moors one millennium ago.

The bridges across the Manzanares River are all named after the city to where you are ultimately led. The Toledo Bridge on the way to Toledo and the Segovia Bridge on the way to Segovia are examples.