We are located in the "Nikhef" building, which is next to the CWI conference centre. The adress is Science Park 105-107.
The KdVI has to be entered via the Nikhef entrance, either by Nikhef key, UvA Card, or by asking the reception if you are invited.
At the moment, there are considerable construction works which you unfortunately have to walk around. This is also the reason why the back entrance is currently closed. Provided below is a route you can walk from the train station.