The Tongkonan Karuaya lower complex is located in the village of Tumbang Datu and is made up of three Tongkonan and nine lumbung (rice granaries). Historically, this Tongkonan complex was considered part of the cultural village of Tumbang Datu, Bebo’ and Karuaya was part of the southern complex. Today, the main Tongkonan is named Tongkonan Sura’ and a plaque with a list of the names of family members belonging to this Tongkonan is hung outside for visitors to read. In addition to the Tongkonan and lumbung, there is also a wide grassy field (rante) used during a Rambu Solo’.
On top of the pillars of the house there are 8 human heads which are said to be the heads of other village champions who once came to take control of the village in Tumbang Datu Village. Legend has it that during the time before the arrival of the Dutch, the village of Rangngi was under attack from a rival village. However, the people of Rangngi were victorious due to their magical abilities and eight prisoners were selected, executed and their bodies buried by the Tongkonan. The skeletons and skulls of these eight people also have myths surrounding them that are still told in the village today