Salar de Uyuni, Bolivia

Bolivia is home to the world's largest salt plains, known as the Salar de Uyuni. The salt flats lie a day's travel south of La Paz and feature some of the world's most spectacular scenery - white plains stretching off into the distance under a bright blue sky. There is no public transport to the plains, but tour operators offer 4-wheel-drive trips to the salt plains and nearby lakes. It's a popular area for backpackers to visit, and after spending many hours in a jeep, some people are inclined to do some exercise afterwards.