01. Arkadiko Bridge
This bridge is the oldest surviving bridge which is still in use. It is believed to have been built around 1300 BC. It acted as part of a military road system between the cities Tiryns and Epidauros back in Mycenaean times. It has a wider berth than a normal footbridge, with a road width of around 2.5 meters (8 ft). What makes it even more impressive is that it’s made purely from limestone boulders, using no binding agent between the stones to keep the bridge intact. That means the bridge has lasted over three millennia from Mycenaean masonry skills alone and has survived it all.