With a diameter of almost 30 miles, this is a structure in the deserts. One of the most unique places in the world, it looks like a massive fossil. Or maybe an alien spaceship landing strip? It is a prominent circle-shaped structure smack in the middle of Mauritania. You can get to the destination from the quaint desert town of Ouadane in the west-central part of Mauritania in western North Africa. Make sure to pack according to the weather of the region. Keep a lookout for the weather.