After Navagio, the most special is arguably Marathonisi – also known as Turtle Island. A short boat trip from the busy and popular resort of Laganas, the island is a natural paradise and protected nesting site for the Caretta caretta turtle with unspoilt golden sands and crystal clear waters.
From a beach in Western Australia made from shells 10 metres deep to tropical shell-strewn beaches in Cambodia and Costa Rica, beachcombers are sure to find something precious on these bountiful shorelines