Between the island and Toucheng is the famous Peikuan Scenic Area. The name Peikuan--or northern pass--comes from its easily defensible topography. It was considered of great strategic importance during the Qing dynasty.
龜山到大溪之間是著名的北關風景區，「北關」顧名思義，由於地形險要，在清朝時曾經是宜蘭的關防要塞。