Here are some comments about the mystery of Stonehenge from people past and present:

What is Stonehenge? It is the roofless past;
Siegfried Sassoon

To Stonehenge... Came thither and find them as prodigious as any tales I ever heard of them and worth this journey to see. God knows what their
use was.
Samuel Pepys

Stonehenge is unique. There are many other stone circles but none with equal impact. Let us make sure that we take care of it. There are no second chances.
Sir Patrick Moore CBE FRS

There is no more important site in England.
Bill Bryson

To me Stonehenge is the physical manifestation of the ingenuity, the determination, the spirituality and the genius of our prehistoric ancestors. I love it, and I love the feeling that I will never fully understand it.
Julian Richards, archaeologist and broadcaster.