Olympus is a tricky area to get to, but it's worth the trip.
There's lots of run mobs, notably Zeus, Odin, Hecate and Hades.

Walk ( 8u, n, kill guardian for the pearl wand if you don't have it, unlock n, open n, n, track messenger, say will you take me to olympus? ) to get from DH to the room marked in blue.