The Temple of the Gods, in the depths of Tartarus, contains a statue of Poseidon, along with a statue of Zeus and Hades. After obtaining the Gauntlet of Zeus, Kratos must shatter the statue along with the other two.
In the Challenge of Poseidon in Pandora's Temple, Kratos finds a massive statue of Poseidon within Poseidon's Chamber. At the end of the temple there is a statue of Poseidon, along with statues of Zeus and Hades, in the chamber containing Pandora's Box.
In game, Kratos visits Atlantis, the city of Poseidon, that contains many statues of the sea god. Later on he manifests himself in one of the statues to threatened Kratos of the destrustion of his city.