NAVIGATION SYSTEM AND LANDMARK HIGHLIGHTING METHOD

A control circuit memorizes identification information of a landmark and a visits count relative to a spot assigned the landmark, in a visits count storing unit. The control circuit updates the visits count stored in the visits count storing unit when the spot assigned the landmark is visited. When a certain landmark becomes included in a map display range on a display unit, the control circuit refers to the visits count storing unit to determine whether a visits count relative to the certain landmark is greater than a predetermined count. The certain landmark is highlighted on the map when the visits count is determined to be greater than the predetermined count.