title: Blue Cave (Penghu)
text: # Blue Cave (Penghu)
  
  The Blue Cave (traditional Chinese: 藍洞; simplified Chinese: 蓝洞; pinyin: Lán Dòng) is a cave on Xiji Islet in Wang'an Township, Penghu, Taiwan. It is part of the South Penghu Marine National Park.
  
  ## History
  
  The cave was created by natural erosion.
  
  ## Geology
  
  The cave is prone to rock falls due to sea erosion and uneven surfaces.
  
  