Looking to uncover the secrets of snowdon and the snowdonia national park then the explorer ol 17 from ordnance survey is the map for you this detailed map covers this famous and popular area which sees many people set their sights on the highest mountain in wales snowdon the map shows size well mapped routes to the summit and is part of the brands active range which allows you to use the map even in bad weathercolour swatchorangebrandordnance surveycolourorange