'Is the Roof Upside-Down'. Senegal. These two images taken from the publication Wonderful Houses Around the World by Yoshio Kumatso. The first image is an arial view taken in the Casamance region of Senegal, and if you look carefully you will see that the center house of the village collects rainwater inside the home to use as drinking water. This is done as although wells are dug, the water is still salty. The second image provides an illustration of the inside of the household.