A stream winds its way through the valley before joining the Houlung. This unnamed stream separates Chiungchiao Keng from the outside world. Chiungchiao is the Hakka word for banana and they say that the village is so named because of the banana-like curve of the valley.
谷中有一條溪澗蜿蜒而下，匯入後龍溪，這條無名的溪澗也成了芎蕉坑與外界的主要區隔，據說，芎蕉坑即因當地略微內凹的山谷樣貌，像一根彎彎的香蕉得名，「芎蕉」就是「香蕉」的客家音。