It is a nice combination of sauna's and swimming pools, with hot 32 degrees C and cold 18 degrees and vapor hath.
Nudity brings quietness and tends to bring people closer with no afterthoughts. Price is average compared with brussels options.
Spa Near Brussels with Some Interesting... - Thermen Londerzeel
Try it nude you are open minded. Lovely atmosphere, great saunas and steam bath, amazing jacuzzis and a lovely heated outdoor pool to swim under the stars.
They also offer good food. Very popular amongst locals and tourists.
My husband and I go to this spa several times per year, saunas love it every time. The cleanliness is pristine and the facilities are nicely varied. The spa is open 'til midnight, too, so you can stay in the water 'til about 23h50 if you want to, at which point you might have the facilities almost all to yourself.
Interesting experience of nudity, sauna... - Thermae Dilbeek
The restaurant is also very good, and the prices there are shockingly reasonable. Note this is a no-swimsuit spa, but you can wear a bathrobe while walking around if you want to no one will bother you or even notice you, busty penelope this is truly not an issue.