The Saronic islands of Poros and Spetses, Greece, are not as well-known as Hydra, but attractive in their own way. The main waterfront of Poros is dominated by tavernas and shops but the attractive town stacks up behind it, culminating in a rocky headland. Spetses is more off the beaten track, its waterfront serviced by a fleet of water taxis and horse-and-carriage transport. It is taverna-heaven, many of which display beautifully hand-painted signs. There are churches and walls and doors...