Rising from the main gorge’s southern end is the large Central Tower , an unusual volcanic plug. A picnic site and ranger’s post are close by, from where a walk descends into the Lower Gorge (Ol Njorowa). In some places the riverbed is dry, in others you’ll find yourself scrambling down a steep and slippery descent. Some steps have been cut into the rock, and some parts may be perilous. We recommend taking a guide.