Answer:
I have an eye but cannot see, You'll head inside when you see me.
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
This only turns over once you have travelled very far. What is it?
In many years, not much has happened. In many minutes, a lot has happened. In one second, everything has happened.
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not
Before Google, we actually had to physically look things up in this building full of knowledge.