We don't built bridges the way we used to. Modern bridges need regular maintenance and even then will fail in a hundred years or so. But then again, Modern bridges have to carry much more weight than their ancient ancestors. The bridge you see here is called the Arkadiko Bridge or Kazarma Bridge. It's on a road between Tiryns and Epidauros in Greece, and it's been there since 1300 BC! The bridge is strong enough and wide enough for cars to pass over (one at a time, please), although it was designed for chariots. It's made of natural stone, cut and fitted together with no mortar. It is held together by pure physics! Read about the Arkadiko Bridge and other Greek bridges that are almost as old at Amusing Planet.
(Image credit: Davide Mauro)
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