Cutting through the Isthmus of Corinth, connecting the Gulf of Corinth to the Saronic Gulf, is a canal so narrow - only 70 feet wide at the base - that most modern ships cannot pass through. Its only claim to fame would seem to be that it has severed Peleponnese from the mainland, effectively making it an island. That said, the lack of commercial activity has left the lane wide open for visitors eager to make the voyage from Corinth to the Aegean Sea, made all the more smoother by the fact that the canal was dug at sea level, thereby obviating the need for locks.
See All Things to do in Corinth Canal »