PAUSANIAS ; SAYS IN HIS TRAVELS ' The Ilissos area with an underground river ' . Today it has been largely built over. During antiquity; it ran outside the defensive walls of Athens. Plato wrote ; the Ilissos river was one of the border of the ancient Acropolis. The still visible area is with a small part to the south of the Temple of Olympian Zeus. Here Socrates said鈥?here as described in Phaedrus.. 鈥楤eloved Pan; and all ye other gods who haunt this place; give me beauty in the inward soul; and may the outward and inward man be at one. May I reckon the wise to be the wealthy; and may I have such a quantity of gold as a temperate man and he only can bear and carry.--Anything more? The prayer; I think; is enough for me.