It is also possible to find this increasingly popular type of secured mountain climbing wall here, specifically not far from the town of Semily, just half an hour’s travel from Jablonec. The Vodní brána rock tower is located above a bend in the Jizera River at the entry to the legendary Rieger Trail. The climbing ascent is about 110 metres long, it has a vertical difference of 75 metres and a medium C+ level of difficulty.