Sacred sites and pilgrimage routes spreading from Mt. Yoshino and Mt. Koya to Kumano Sanzan (three major shrines, Kumano Hongu-taisha Shrine, Kumano Hayatama-taisha Shrine and Kumano Nachi-taisha Shrine) were also registered as a World Heritage site as "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range" in July 2004 by the United Nations Educational, Scientific and Cultural Organization.
さらに吉野山・高野山から熊野三山にかけての霊場と参詣道が2004年7月、『紀伊山地の霊場と参詣道』として国際連合教育科学文化機関の世界遺産に登録された。