Northeastern of Kolonaki extends the area of Evangelismos which has developed around the General Hospital of Athens, Evangelismos and has taken its name from it. It is serviced by the metro station with the same name and while there are a lot of offices buildings and hotels at the same time it is a residential zone that continues to Ilisia. Ilisia is one of the most densely populated areas of Athens. The river Ilissos which gave the name to the area has been flowing underground since the 1960s.