Latitutde: 37.175000 Longitude: 21.920000Website Link
It’s well worth heading 800m along the road from Mavromati village, past the museum at the turn-off to the site, to the celebrated Arcadian Gate. This unusual stone portal with a circular courtyard between the double gates and an immense, half-collapsed gate post guarded the ancient route to Megalopoli – now the modern road north to Meligalas and Zerbisia – which runs through the gate. Running uphill from the gate is the finest surviving section of the mighty defensive wall built by Epaminondas.
Read more: http://www.lonelyplanet.com/greece/ancient-messini/sights/historic/arcadian-gate#ixzz4InfjXk1U