The sea around Kastellorizo really is crystal clear. There a couple of tiny beaches which are difficult to access, but most swimming is done from rocky ledges, harbour quays or boats. The island's main town is so relaxed that you can sunbathe and swim from the main harbour quay, and you are never far from the next cool drink or a snack.

The harbour is deep, and beyond it the sea descends to below 300 metres within a kilometre of the coast. A good swimmer could make it to one of the islets of the north coast, though beware of currents and passing speed boats.

For snorklers, the water is full of a variety of fish, octopuses and other submarine creatures. Dolphins, monk seals and loggerhead turtles (carreta carreta) also haunt these parts.

Watch out for sea urchins on the sea bed! Stepping on their spines is an extremely painful experience.

The best locations for snorkling can be reached by the local cruise boats and water taxis (see page 4: activities for details).