Some of the things that blow me away is the sheer scale of the late bronze age: The massive cities, the trade fleets, leaders sending each other gifts, the exchange of skills between regions and the massive trade routes for tin, copper and bronze. It completely destroyed the anglo-centric epochism I was taught in school.
And in a short time it all collapsed. We don't see that level of trade, size of ships, cities of that size, level of diplomacy etc etc for well over 1000 years.