10 Interesting Facts About Pyramids:

1. The pyramids were once the tallest human-built structures
2. There are actually more than 100 pyramids in Egypt
3. Pyramid stones weighed more than an elephant
4. The pyramids are not completely solid
5. The pyramids were not built by slaves
6. The Great Pyramid was very well constructed
7. The pyramids appear to be aligned with the stars
8. Special mortar helped the pyramids survive
9. There are secret doors inside the pyramids
10. The pyramids used to shine like diamonds