You can climb independently at “de Klimmuur” with your belay certificate or if you can show your experience. If you’re not experienced, you must book an introductory lesson or introductory course. Because of safety reasons this rule is very important.
The climbing world has a tradition of boundless freedom. We are part of that tradition! You don’t need a membership to come in and climb. You decide if you buy a single entry, multiple entry or subscription. The possibilities are endless.
Another possibility is lead climbing, of course. You will need permission from the responsible staff of the “Klimmuur”. When it’s busy with climbers, lead climbing is not allowed.