Some would say the world, but I’ve not done the research to establish the veracity of their claim. This is the mosque in Djenne, a small trading town on the Niger River in Mali. This photo was taken very early in the morning, just after sunrise and before the crowds arrived in the square. Sadly no interior shots as I was barred on two counts, being both a woman and a tourist.
The wooden protrusions are used in the annual festival of mud slapping, which is how they keep the mud buildings in the region in tiptop condition, as sort of desert Holi without the colour. No doubt a great deal of fun but to be avoided if you don’t have a plentiful supply of clean water; which is not that reliable in this area.