Salt flat
A wide, dry plain of crystallised salt — a landscape that has had all its water taken out.
A salt flat in a dream is the dream's image of a landscape that has had all its water taken out. The flat is bright, level, and biologically empty; what was once a lake has evaporated and left a hard crust. The dream brings the salt flat when something in your life — an emotional landscape, a creative field, a relationship — has had all the moisture drawn out of it, and what remains is the residue. A salt flat walked across with the right boots is the dream telling you the crossing is possible. A salt flat in which the surface gives way to wet brine underneath is the dream noting that the dry appearance is a thin crust and the trouble underneath is real.