Take Highway A12 from Antwerp to Rotterdam. Take exit 15 "Kapellen". At the traffic lights go right, and back right over the bridge. After the bridge, go right at the traffic lights. And turn right at the 6th street "Vierkerkenstraat". At the end of this small street is a parking and a pedestrian brigde over the highway leading to the Put van Ekeren.
Train: take the train from Antwerp to Essen and get off in 'Ekeren'. Walk towards the centre via the Veltwijcklaan. The entrance (Kasteel Veltwijck) is about 10 minutes walk.
Bus: take bus no. 77 to 'Ekeren Markt'. The entrance through the castle is about 5 minutes walk.
On the map you can see some red dotted lines, this are all the walking paths and the red arrows are the different entrances, but the most beautiful entrance is via the castle Veltwijck (north)