Snowdon - Conwy Valley
The Explorer series of maps from the Ordnance Survey are very clear and easy-to-read and are printed on both sides, which means that they each cover an enormous area. No footpaths are shown on them except for long-distance routes. The map is therefore suitable for anyone who's planning any kind of outdoor activity, such as cycling and horse riding, but also, of course, for hikers as well. The presence of contour lines and indications of developed and undeveloped areas make planning trips through this part of the world a mite easier.