Not every billionaire was born rich. In fact, many of them became wealthy previously living in poverty.
When the Spanish photographer Govin Lapetule heard about the concept of a "small house", he got really excited by this idea.
Originally bricks are formed out of clay, but in Karaba, a small African village in the southwest of Burkina Faso, bricks are mined directly from the hills.
There are many amazing cities in the world; houses, which are painted in all colors of the rainbow.