Kastro, the ruined castle which dominates the road south from Argostoli, is all that remains of what was the medieval venetian capital of Kefalonia. At its height the town had a population of 15,000, but was largely destroyed, as is the way on this island, by a massive earthquake in the 17th century.

What is left is worth a visit, not least for the views from the ramparts, which Lord Byron is said to have particularly admired, and a few bars and tavernas cater for the burning thirsts of those enthusiastic enough to have walked up the steep approaches.