By car:

All highways towards Amsterdam lead to the ring road around Amsterdam, the A10. Choose direction Utrecht-Den Haag if you come from Amersfoort. From Utrecht/Den Haag/Schiphol/Haarlem/Zaandam, follow the directions to Amersfoort.

Take exit Watergraafsmeer/S113. At the end of the exit, follow the directions to Watergraafsmeer/Science Park. You will now be driving on the Middenweg. Follow the signs Science Park/Jaap Edenhal. Turn right at the first big intersection, this is the Kruislaan.

Drive straight on for about 1.5 kilometer. You will reach the X/OS offices after going under the railroad bridge and driving almost to the end of the road. Note that the road after the railroad bridge is renamed to Science Park per January 1, 2009, but maps and route planners might still know it as Kruislaan. Our office is located in the white building, at the last entrance on the left, number 140 (when the road was called Kruislaan, the number was 419).

With public transport:

From Central Station in Amsterdam, take the train or metro to Amsterdam-Amstel station. From Amsterdam-Amstel station, take bus 40 to Muiderpoortstation. Get-off at the stop called Kruislaan 400. Our office is located in the white building, at the entrance with number 140. You can also take bus 40 to Amstelstation from Amsterdam-Muiderpoort station. Get-off at the same stop as mentioned above. See the GVB website (Amsterdam public transport) for timetable information of bus 40.