8. Great pyramids
Remarkable constructions dating back over 5,000 years were the Egyptian pyramids in Cairo. They are revered as emblems of honor for Egypt’s past pharaohs and kings and are said to have many secrets regarding their views regarding religion and the afterlife. Numerous tunnels and hidden chambers that archaeologists have found in the pyramids raise concerns about how and why such advanced constructions were constructed. Many think there is still a great deal to learn about them, even though we already know a lot about them.