With the train:

Take the KVB line 18 (Kölner Verkehrsbetriebe) (from Bonn or Cologne) and get off at the Efferen stop, approach the T-crossing, cross Luxemburger Str. and after 20 metres turn right into Rondorfer Str., after 300 metres the next road on the left is Hahnenstraße and the destination is on the right after 40 metres.

With the car:

• Coming from the A4 autobahn:

Exit Köln-Klettenberg, turn left at the crossroads, after 600 metres, shortly after the ARAL gas station, turn left into Rondorfer street. After 300 meters the next street on the left is Hahnenstraße and the destination is after 40 meters on the right side.

• Coming from Köln (Klettenberg):

on the Luxemburger Straße cross the motorway A4 and after 600 meters, shortly after the ARAL petrol station,
turn left into Rondorfer Str., after 300 meters the next street on the left is Hahnenstraße
and the destination is on the right after 40 meters.