Not sure how many people know, but on the main island of Tonga there are stone structures similar to that of stonehenge. They are also astrologically aligned. But I believe that there's a history behind, showing the greatness of a king, I don't quite remember.

Do you have or know where to get pics of this?

picture or a link would really help i'd love to know about it as i'm interested in stone henge

Structures similiar to stonehenge appear all over the world. Many are astrnomically alighned with orion. I believe that this realy dosnt hold any great unknown wealth of frogetten astrology, other than Orion is one of the most visible constilations year round. I do believe that there is a Stonehenge structure located within the United States even.

have you got a link to these sites on Tonga?

and are they in some way similar to the ones on Easter ISland?