OS Explorer Maps OL16, OL42 & OL43 In the north of Engl&, Northumberland National Park contains Hadrian's Wall & the Cheviot Hills. There are facilities for horse riders & cyclists, as well as for walkers of all abilities, from short pub walks to multi-day hillwalking tours. Northumberland National Park also has three National Nature Reserves, popular with birdwatchers & a Dark Sky park for Stargazing. This map bundle contains all 3 OS Explorer Maps for the National Park with a discount of 20% compared to the cost of buying them individually, & is available in both standard & weatherproof ' Active' versions. Whatever activities you plan on your visit, you can make the most of it with Ordnance Survey maps. With all OL maps in this set you will receive a code for use on your i OS or Android smartphone or tablet.