Things like this is why the AI is terrible - this is late game, immortal, huge, archipelago. AI Ethiopia has at least 20 archaeologists (I already killed some) and there are more than enough to dig up the rest of the sites - if they can get to it first. This is not really rational behaviour and the AI should never have spent that many hammers building these - they could've built more military (it has been in a war with the Danish and Ottomans recently) or built buildings, or even spend the hammers on science or gold.
I'm about to abandon the game because it's just a matter of time when I win, and Ethiopia is the only civ that is sort of remotely competitive. It's just silly when you see things like this.
Any other stupid AI things you see (aside from the usual idiotic "embark near enemy city" and that kind of thing)?