Busswil is located on the old Aare river, the part of the Aar river that still flows from Aarberg to Büren after the river was corrected in the 19th century to stop the flooding which had been completely inundating Busswil since ancient times. In those days the Celts from neighbouring villages to the north used the "Obererer Weg" to travel to the market town of Lyss. Also of note is the ancient oak tree in the middle of a field next to the Länggasse, at which Napoleon is said to have rested with his troops on the way back from his Austrian campagne.