Standing for over 3,300 years, the Kazarma Bridge in Greece is an engineering marvel from the Mycenaean era. Built around 1300 BC, this 72-foot bridge was initially used by chariots on a military road connecting Epidaurus and Mycenae. Remarkably, the bridge was constructed without mortar, using massive limestone blocks carefully arranged to rely solely on gravity for stability. This "Cyclopean" masonry technique has allowed the structure to survive the ages, still functioning for modern vehicles