Matmata troglodyte houses are definitely a must-visit place. The structure alone is impressive, with a central courtyard of different emerging "corridors" dug on the land itself and leading to the different rooms. They usually have a lot of animals out the front of the house, such as chickens, horses, donkeys ... The lifestyle they have may surprise you, as it seems to be one of extreme poverty. In time you realise that for them the things we consider essential are completely unnecessary in their daily lives.