When we hear the word 'pyramid,' we automatically think of Ancient Egypt. As incredible as Egypt's pyramids are, they're not the oldest in the world. That honor belongs to the Hellenikon Pyramid, which is somewhere around 4700 years old.
The pyramid is one of many to be found in the Argolis region of Greece. As we don't know how the Egyptian pyramids were built, we're at an even bigger loss to deduce how the Ancient Greeks went about making this one.