The phrase "great pyramids" refers to the large and impressive ancient structures built in Egypt, which are shaped like triangles and made of stone. Full definition
This is why rules like «Don't climb the fucking Great Pyramid» exist. (mommyish.com)
In 2016 the world generated e-waste — everything from end - of - life refrigerators and television sets to solar panels, mobile phones and computers — equal in weight to almost nine Great Pyramids of Giza, 4,500 Eiffel Towers, or 1.23 million fully loaded 18 - wheel 40 - ton trucks, enough to form a line from New York to Bangkok and back. (sciencedaily.com)
Monks Mound is bigger than any of the three great pyramids at Giza outside Cairo. (discovermagazine.com)