Sandwich Bay in Namibia is only accessible by 4x4. This provides a closer look at the formation of 'the world's oldest desert' - its origins, composition and movements. Spring tides and shifting sands ensure an unpredictable route, there are many stories where people have lost their vehicles in the sea being unaware of the high-tides but as you approach the towering, wind-sculptured dunes with the breathtaking background of the sea, it's another world! I was in a following SUV, clicking this.