Orienteering can sound complex, but by placing your own compass over the map illustrations and following these instructions, you’ll discover that it’s actually quite simple—and fun.

Earth is surrounded by a magnetic field generated by electric currents from within the planet. Compasses take advantage of this field to identify north and serve as a navigational aid.

The design at the very center combines a starlike Western compass rose inside the squarish ... growth and development since the 13th century. Illustration by Gareth Fuller The map, roughly four ...