The tongkonan is the name of the traditional housing in the regency of Tana Toraja, Central Sulawesi. (Indonesia) They are really quite spectacular part of the landscape and a major attraction of the area.The upturned ends of each roof are supposedly representative of the horns of a bull, but also contribute to keeping the house cooler during summer. They hold several rooms upstairs and usually a porch and/or other rooms downstairs.
Tongkonan are made using no nails, they are fitted together using a clever combinations of joints and fittings. Traditionally they also make rice houses for storage in a similar manner. The cow horns represent the wealth of the family.
In many cases, they are being left behind for modern housing, though recently there has been a resurgence of interest in these houses.