The Kaap Valley has numerous rivers running through it, like the Ngwenyana (Little Crocodile River), Noordkaap River, Suidkaap River, Queens and others.
From the confluence of the Noordkaap and Suidkaap rivers the river is known as Kaap river.
All these tributeries eventually join up and run through the mountains to join the Crocodile River at Kaapmuiden.
These rivers have over the ages eroded the Kaap Valley and formed a kaleidoscope of numerous little ravines all covered by bushveld, harbouring a variety of various mineral and semi precious stone deposits, from as far back as the prehistoric Achaean Age, known as the "Barberton Greenstone Belt".
During June 1882, James Murray discovered alluvial gold at the confluence of the Noordkaap River and Jamestown Creek.