The "false cypress" forest of Chilan in Ilan County is the only biological heritage site among the 11 locations shortlisted by the Council for Cultural Affairs for nomination as World Heritage Sites. The forest is made up of Taiwan red cypress and Taiwan yellow cypress, and covers an area of over 50,000 hectares. These "false cypresses" are relict species left over from the glacial period 30 million years ago.
「棲蘭檜木林」是文建會十一個世界遺產中唯一的生物遺產，由紅檜與扁柏組成，散佈在五萬多公頃面積內。