Letter: Where on earth is that hexagonal city?

From Geoffrey Clark

Douglas, Isle of Man

As a town planner I had a great interest in your piece on traffic in honeycomb-patterned streets (5 November, p 17). But I could not identify the town or city in the bird's-eye-view picture. Would you please identify it for me?

The editor writes:

• It is Grammichele in Sicily, Italy.