A two-millennia-old engineering dream that became a modern navigational headache

Countries & Cities · Published 30 September 2026 Swipe more like this →

In short: The Corinth Canal was envisioned by ancient tyrants and Roman emperors, yet it remains a narrow, landslide-prone passage. Despite saving ships a 700-kilometre detour around the Peloponnese, its geological instability and tight dimensions have relegated this ambitious shortcut to a niche route for small vessels and curious tourists.

The ambition to slice through the Isthmus of Corinth dates back to the 7th century BC, when the tyrant Periander abandoned the idea in favor of the Diolkos, a stone trackway for dragging ships overland. Later rulers, including Demetrius Poliorcetes, Julius Caesar, and Caligula, all toyed with the concept, often deterred by fears of flooding or, in the case of the Roman emperors, their own violent deaths. It was Nero who finally broke ground in 67 AD, utilizing 6,000 Judean prisoners to dig trenches, but the project stalled upon his death.

Modern construction finally succeeded between 1881 and 1893, though the project was plagued by financial collapses and the inherent instability of the region's faulted limestone. Even after completion, the canal struggled. Its high walls funnel strong winds, and tidal differences between the Ionian and Aegean seas create currents that make navigation treacherous. Furthermore, the wake from passing ships caused persistent landslides, necessitating extensive masonry work. Between 1893 and 1940, the canal was shuttered for four years total just for maintenance.

The canal's strategic utility has been hampered by its narrow 24.6-metre width and shallow depth, which exclude most modern commercial vessels. During World War II, the canal suffered significant damage; retreating German forces in 1944 triggered landslides and dumped infrastructure into the channel to block it, requiring a massive clearing effort by the United States Army Corps of Engineers that lasted until 1948. Today, the canal serves primarily as a tourist attraction, with occasional spectacles like the 2019 transit of the MS Braemar, the largest ship to ever squeeze through the passage.

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