Alcala de Henares, arched gateway.

Originally the major Roman settlement (Complutensis) in what is now the Madrid area, and situated approx 10 miles east of the modern city, Alcala de Henares was the early university centre and houses the (excellent) archaeological museum for Madrid Province.
The vast Ciudad Universitaria (University City) complex in Northwest Madrid is named Complutense in honour of the original university here and after its original Roman name.
It is also one of the places that claims Cervantes as its son.