The Piekenierskloof plateau sits high in the Citrusdal Mountains, around 50 km north of Swartland and 160 km from Cape Town. At 600 to 750 metres of altitude, the days are warm but the nights turn cold, with mountain air sweeping in to refresh the vines after sundown. It's a wild, sparsely planted corner of the Olifants River region, better known for citrus orchards than vineyards, which is exactly why the wines coming out of here feel so distinctive.