Tens of millions of years ago Hsiukuluan River commandeered the headwaters of the Hualien River, and cut a 90-degree bend through the coastal moutain range to reach the Pacific Ocean, coursing over more than 20 sets of rapids in 20 kilometers.
千萬年前秀姑巒溪在此處「襲奪」花蓮溪的上游，以九十度的急轉彎切穿海岸山脈注入太平洋，在二十餘公里的河流間造成二十多處急流。