Beyond the gorge is 'One-Line-Sky' where rocks are as steep as if cut by a sword. Standing between the steep cliffs, one can only see a narrow line of sky, hear his own voice echoing as he talks or laughs.
「第一峽」對面就是「一線天」，山岩如同一劍劈開，人在巷內，仰望頭頂，天光一線，兩邊又是石壁峭立，遊客在內談笑，會發出急促的迴響。