Mystras Greece. There's stunning scenery travelling through the mountains to Mystras. The first images below show how the site dominates the fertile plain of Sparta below but this ancient centre dominated politically and economically as well. Mystras was the pre-eminent power in the Peloponnese in Byzantine times. Deservingly famous for its Byzantine churches and frescoes. This region of the Mani is renowned for trekking. Visitors should be aware that the site is steeply sloping and on a hot day, the climb can be quite demanding so - start at the top!