They certainly heard there were pyramids in Egypt. The Greek historian Herodotus mentions them around 400 BC, but even he had never seen them and what he mentions doesn't line up with what they were supposed to be. Plus he mentions several times in his Histories that he doesn't believe what he's writing (for instance about the wars with Persia and the battle of Thermopylae) but he's writing it down because it's what people say is true. And yet he's our source for so much of that stuff, even though he says his own history cannot be real and numbers for a lot of things are exaggerated.

Also the Greeks built Alexandria and several other cities in the Nile Delta and were at any moment less than a day's journey from the Great Pyramids, yet they never visited them or recorded down their existence.

The Egyptians of 3000 BC didn't have the wheel. Pretty much everything was moved down the Nile by boat or by camels/donkeys or such. Later on better technologies came in from the Middle East and then later they had chariots and stuff and major roads.