The National Archaeological Museum holds the Mask of Agamemnon, the Antikythera Mechanism — the world's oldest known analog computer — and the bronze statue of Zeus or Poseidon caught mid-throw. Socrates taught Plato here. Plato taught Aristotle. Aristotle tutored Alexander. A single city that generated a chain of intellectual influence the West is still running on.
Jebulon, CC0, via Wikimedia Commons