We took a day trip from Hoi An to My Son by private car leaving at 6 am to be there by 7 am. It is extremely hot anytime later and we have heard that crowds of tourists show up by 9 am. It is located in a lush narrow valley with many springs flowing through it, which is an ideal site for the most culturally condensed religious center of the Champa kingdom. They were constructed between the 7th and 13th century AD according to Hindu consciousness. It is World Cultural Heritage site by UNESCO as of 1999. Much of it was detroyed in the many wars in Vietnam and in particular the American war. They are still working on it as evidenced by many archialogical digs in the area.