Why is Easter Island more mysterious?

There is Mysterious Statues of Heads made by unknown people.

The mysterious monumental statues dot this remote isle. Some of the statues are female but it is not clear what these monuments are intended to represent; they are as far as can be deduced, not tombs, and nobody is exactly sure what they represent. The Very stones cry out!

Another part of the mystery is how the people who made the statues lived, why did they come there and why did they leave. The mysteries persist because there are no people left to tell the stories.