Uyuni, Bolivia - 24 May 2018 Uyuni is a small municipality on the edge of the great salt flats of central Bolivia. It used to be a transport hub where four major railway lines converged, as well as a British-built distribution hub for the trains carrying minerals on their way to the Pacific Ocean ports. Today, its main attraction - apart from being a starting point for visiting Salar de Uyuni - is its eerie graveyard for antique steam trains, seen here.