Fantail Falls sits to the south of Haast Pass not far from Thunder Creek Falls. During the spring, this 15m waterfall indeed can look like a fan as its name suggests. But I tend to think it looks more like a bulb (as the stream consolidates at the base of the falls instead of continuing to fan out). Its car park is well signed and the walk is no more than 5-10 minutes so it is a very popular stop for those driving through Haast Pass..