Spreewald Boat mail.

The Spreewald is a waterlogged area starting north of Dresden and extending north towards Berlin. For centuries the area was served only by waterways – a vast network of rivers and canals. Areas of dry ground are used for mixed farming and the produce is, even today, shipped out by barges. Along with it, mails are also carried by boat in the region.The mail is delivered to letterboxes on the river by a yellow-clad postmistress – pushing a yellow-painted Kahn (boat) .