As we move from the main Palace to the hill, is a pool at the end of which is the Neptune Fountain. A retaining wall curving back forms the back wall of the vast basin. At the centre is a semi oval plinth from which rises the statue of the sea-god Neptune surrounded by his entourage.
Above the rocky grotto stands Neptune in a shell-shaped chariot, his trident in his hand. To his left is a nymph, while on his right kneels the sea-goddess Thetis. Frolicking at the foot of the grotto are the Tritons, creatures who are half-man and half-fish, and belong to Neptune's entourage.