Styx Waterfall

From Kalavryta, a private vehicle must be taken along the road leading to the top of Chelmos, near the observatory. The hike begins from the side of the road with a descent along a rocky, rugged path that is far from beaten-in but is pristine. About midway through the hike, you will encounter a small alpine lake with dark water (which may be dry during the summer months). The area, including the Styx Waterfall, is known as Mavroneri ("black water"). 

The steep descent to the waterfall takes about 1.5 hours, which flows more or less abundantly depending on the time of year (in the summer, the waters slow to a trickle).

The small cave beside the waterfall offers an opportunity to touch the water and sign your name on the cave walls, if you feel inclined. The way back is simply the reverse of the way in — entirely uphill. But the views from the cave and throughout the entire hike are well worth the effort.

The hiking route is indicated on rocks found along the way, but the starting point is not obvious. Adjacent to the start is a very small house, presumably the residence of the owner of the sheep that graze the area.

Moreover, the terrain is rough and is likely to be challenging for beginners. For these reasons, the hike should ideally be done with a local guide from Kalavryta, which can be informally arranged by going to the adventure tour company Kalavrita Explore in the town center. Ask the owner (or an employee) to speak with Vasilis, a nearby shop owner experienced in hiking the route. He can be hired privately as a guide.