OS Explorer map sheet OL53 shows central Southern Cairngorms National Park, from the Backwater Resevoir to Balmoral & Ballater. This map replaces the previous OS Explorer map 388 for this area With this map you will receive a code for use on your i OS or Android smartphone or tablet. Find our more at Mobile Download FAQ. There are 11 Munros in this area, as well as a number of other peaks plus the Deeside & Lochnagar National Scenic Area. The OS Explorer map for Lochnagar, Glen Muick & Glen Clova is available in both the standard paper version & weatherproof ' Active' version.