Only my second cache of the day in Brussels, but I've already walked 5+ km. Very interesting history about this as I did some reading online and in the area. The cache was easily located, but I wasn't quite sure how to open the container. A few seconds and that was figured out also and I was able to sign the log. Very interesting how the trees are woven together here which is something I've never seen before. More touring to do, so off I went.