The small, solitary Guishan Island is located about 10 km off the coast of Toucheng in Yilan County. It has a volcanic terrain that, from certain angles, looks like a turtle floating in the sea. Among the features of the island are high cliffs, steaming fumaroles, welling underwater hot springs, mountain peaks, sea-eroded caves, a lake, and unique cliff vegetation, as well as rich marine ecological resources. It is a perfect place to study volcanic terrain and the natural ecology. Dolphin-watching is a popular activity for tourists and it is recommend to choose dolphin friendly label tour operators to support responsible tourism. Taiwanese lily is also an attraction and the best season for flower viewing is in March and April.