Orienteering is an outdoor sport where competitors navigate through unfamiliar terrain using a map and compass to locate control points. It began in Sweden in the late 19th century as military training and has grown into a competitive sport open to civilians. Participants use maps, compasses, and control description sheets to navigate through forests and find orange and white kites marking the control points, checking in using a finger stick. The goal is to locate all controls in the fastest time while using the map's symbols like contour lines to determine elevation changes across the landscape.