Although the town itself is uninspiring, it's no surprise that half the streets are named after trees or plants. Clanwilliam is at the edge of one of the natural jewels of the Western Cape—the Cederberg Wilderness Area, which takes its name from the cedar trees that used to cover the mountains. In spring the town is inundated with flower-watchers. Clanwilliam is also the center of the rooibos-tea industry.
Clanwilliam was home to Dr. Christiaan Louis Leipoldt, poet and Renaissance man. He is buried in a lovely spot in the mountains a little way out of town; you can visit his grave, which is on the way to the Pakhuis Pass (R364; there's a small signpost). You could also pop into the Clanwilliam Museum, which houses a room devoted to Leipoldt.