atlantis
in his undersea palace and sometimes Olympus
Poseidon's hometown is the deep sea and he lives in an undersea palace.
the function of Poseidons temple was for Poseidons honor.
when you find hedes palace next to apoolo's place go down to hedes palace and you find a big mud thing then walk to the right side and you see another mud thing get on top of it ride all the way to the top and jump off to the right side and there you have it theres poseidon's palace.
Rhea.
cronus
Cronus and Rhea
Neptune
a trident
Triton
Rhea.
In myths, he does not have one.