Some modern-day pyramids HAVE been built. For the most part, they are not funerary buildings (tombs) like those the ancient Egyptians built and some built by the ancient Maya, nor have they tended to be temple and building bases as were many of the "pyramids" built by the ancient Aztecs, Maya and other peoples and found in Mexico and Central America.
Here are links to images of some present-day pyramids:
* Entrance to the Louvre Museum, Paris, France: http://tinyurl.com/3noeyd7
* Transamerica Tower, San Francisco, California: http://tinyurl.com/43n2867
* Gold Pyramid House, Wadsworth, Illinois: http://tinyurl.com/3zwa769
* Links to lots of images of pyramid shaped houses: http://tinyurl.com/44mon44
* Slovak Radio building, Bratislava, Slovak Republic: http://tinyurl.com/3fdh4zf
* Building along river, Sacremento, California: http://tinyurl.com/3vatel9
I hope those are enough images to give you the idea that humans are still building pyramidal shaped buildings.
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