There is a sign by a bridge on the right side of the main path with mention the area and one of the routes (Zues 6b). Follow this sign across the bridge, head left and then up a lose rock cone on the right. Follow this trail up a few hundred feet (of elevation gain). It involves some scrambling so shoes are recommended. You will pass a large arch with several overhanging routes on the right (Hram) shortly before the Olimp wall. The wall is obvious, it is a clean wall with what look like lightning bolt cracks all over it.