The narrow neck of land where Kassandra joins the rest of Halkidiki is cut clean across by a short canal at Nea Potidaia — a fact that, technically, makes Kassandra an island. The canal was first dug in antiquity, when the spot was the location of the ancient city of Potidaea, and was reopened in modern form in 1937.
The canal itself is only a few hundred metres long, but its setting is unexpectedly photogenic: a Venetian-era stone bridge spans it, fishing boats line both banks, and the water turns deep blue under the right light. The town of Nea Potidaia on the Kassandra side has good seafood tavernas — a natural quick stop on the way down or back from the peninsula.