What's wrong with this picture?

The cancellation stamp for mail from Tierra de los Sueños, whose postal authority is TdSPosta.

Sending mail from Tierra de los Sueños is difficult, because remembering dreams clearly upon waking is a very iffy business; all mail must successfully cross the International Waking Zone / Zona Internaçional de Vigilia.

Vleeptron PizzaQ: An old, old Question from Childhood:

What's Wrong With This Picture?