Completely different in appeal to robust Ch'ihsingshan is another extinct volcano, Tatunshan, goal of the park's second walking tour. Tatunshan was one of the first volcanos in the range to lay dormant, and its crown is weatherworn into a bell-like shape.
大屯山「蝶戀花」好戲開鑼大屯山是山群中最早噴發的火山，山頂早已被風、雨侵蝕成圓圓鈍鈍的鐘狀，與錐形山頭的七星山大異其趣。