Yes, Magna Graecia is a shame. Here is a custom battle map of Syracuse. You can also play a custom siege battle and the mighty walls are really not easy to scale.
Syracuse from the quarries (with the great harbour to the right):
Syrcuse from the Athenian camp with the island of Ortygia in the background:
Syracuse from Ortygia (with Mount Aetna puffing smoke in the background):