Bujang Valley is located near Merbok, Kedah between Mount Jerai in the north and Muda River in the South, approximately 224 km2   , it contains sprawling historical complex and also one of the richest archaeological site in Malaysia. The concept subtraction is derived from the missing part of the history which caused by the invasion of Chola empire and also the modern civilization. these incidents caused the mysterious missing part of the history has yet not to be discovered. Square as the most simplest shape of a cube representing peaceful and stability and also representing the natural order of universe that symbolizes Hinduisms at Lembah Bujang during those days. User experience representing the missing piece, as it is up to the user to reconnecting the history through their experience in the Visitor interpretive centre.