From Bouchout castle, we drove to Beersel. With our poor grasp of French and the previously mentioned Belgian aversion to signs (never mind the absolutely insane drivers :) ), we had some trouble getting there. We arrive just before 5, and the castle was still open - the groundskeeper didn't charge us for entry either. Here's a picture of the front - this castle is very old, the main part dating from the 13th century, with the towers being extended in the 16th:

Here's the interior - note the stage? They put on concerts there. Must be an interesting place for them. The bridge leading in is pretty wobbly. The moat was mostly gone, but that's a restoration thing - they should have it all back together in 3-5 years. Anyway, the interior:

My daughter and I walked up the towers - you can go about halfway up. We also walked all along the guard wall. It's decayed a fair bit, but this was definitely a cool castle.