![OS Explorer Map Active (200) Llandrindod Wells and Elan Valley, Rhayader (OS Explorer Active Map)](http://monsterbookshop.co.uk/cdn/shop/files/9780319470725_420c8702-5db5-4a3e-ab31-4b5f967f78d3.jpg?v=1719152299&width=1445)
OS Explorer is the Ordnance Survey's most detailed map and is recommended for anyone enjoying outdoor activities such as walking, horse riding and off-road cycling. The series provides complete GB coverage and can now be used in all weathers thanks to OS Explorer - Active, a tough, versatile version of OS Explorer. The OS Explorer Active range now includes a digital version of the paper map, accessed through the OS smartphone app, OS Maps.