https://www.facebook.com/peter.goossens.photography/videos/467359900055780/?pnref=story
Short video clip from facebook

Yes, a very interesting place. They open it for cavers from time to time. Some bits are rigged to make them more 'interesting' - like the leaking water pipe.

In Belgium we use not only old WO forts but also Basilca, towers, quarries as training sites

Some examples

- Koekelberg Basilica (Brussels)
  2 yearly event on the Koekelberg (Brussels) Basilica
  http://www.gsredan.be/rallye/home.html
  In the basement of this Basilica there is permanent training facility too
  http://www.gsredan.be/site/visite-virtuelle-de-la-salle.html

- Tour du Roton (Tower / old Industrial plant)
  http://sus-pendus.be/la-tour-du-roton/

- Villers le Gambon (Quarry)
  http://www.speleoviavlg.be/vlgfr/index1.html
  Rigging plan : http://www.speleoviavlg.be/vlgfr/index1.html

BR

The rally on the basillica is amazing, I've done it twice with York Uni CPC. It's usually every 3 years but last time they only waited for 2. It takes a whole year to plan and 3 weeks to rig with over 3 k of rope. Its really brilliant everyone should do it.

Heres some photos  http://www.yucpc.org.uk/gallery/album.php?id=293&year=&author=&keyword=&sort=AlbumDate&page=3  http://www.yucpc.org.uk/gallery/album.php?id=341&year=&author=&keyword=&sort=AlbumDate&page=1#8


and a video I made https://www.youtube.com/watch?v=yW94p6bymTQ