I don't know for sure, but I think it's where her last "battle" was.
y do you care
Probably her temple in Athens, Greece..
ask percy jackson
You do know that she's not real, right? She can't have a "last known location" if she never existed.
She is a Greek goddess so her last location would be Ancient Greece.
The sea.
hell
pooooop
He had no last known location because he was not real. Even if he were, he was a god, and thus, omnipresent.
Hera was a goddess and omnipresent. To assign a "last known location" implies that she had a physical form that could be attached to a single location. The Greeks did not see their gods this way.
Mount Olympus
y do you care