When a strip of sand is regularly named best beach in the South Pacific, best beach in Australia, and one of the top five beaches in the world, you know it's really something special. That beach is Whitehaven, a 7km stretch of perfectly pristine sand – the world's purest silica – on the uninhabited Whitsunday Island. Beyond the shore, the water is azure-blue and remarkably clear; sea turtles are often spotted in the shallows. Get there by catamaran, yacht, semi-rigid inflatable, helicopter or seaplane.