See dunes and walk on them announces upcoming difficulties. Making a hole and lying on it indicates heavy losses of money.
Dream dictionary: Dunes dream meanings
To be in or to see a sand dune, when you are dreaming, stands as a symbol of your fears for uncovered thoughts in the real world. You may have desires that need to be hidden and protected. Are you afraid of the bitterness of reality? A dune is an accumulation of sand in the desert or the coast – it is like the accumulation of your fears….