Hugely impressive Roman ruins make it easy to imagine city life here two millennia ago, when crowds in the amphitheatre cheered wildly as slaves fought wild animals and the theatre hosted top musical talent – as it still does today. The remains of Herod's vast port, built to rival Alexandria, have been turned into one of the loveliest spots in Israel for a seaside meal or a cold beer. For a look underneath the harbour's turquoise waters, book an introductory scuba dive.