Dive2Adventure, Mark Bruijnis
Cliffortstraat 29, 9423 PS Hoogersmilde, NLD
Near the exit 24 "de Wijk" on the A28 you will find the pool "de Slenken", an ideal pool for diving lessons. There is a shallower part 2 meters and a deeper part 3.8 meters.
This is a pool where, of course, there is little marine life. Counting tiles could be an activity is practicing skills is not the way to go.