Backing a pretty landscaped garden right beside Hwy 11 are a series of rocky cliffs cut into which are at least 30 natural caves and crevices. Within, archaeologists have found signs of human habitation from around 30,000 years ago: the oldest yet known in Taiwan. Learn more in the small visitors centre then climb stairs to the main caves, which are on two different levels.
Cave 2 doubles as a Buddhist shrine and was home to an octogenarian hermit until 2017. Don't feed the monkeys.