![OS Explorer Map Active (284) Grimsby, Cleethorpes and Immingham, Caistor and North Thoresby (OS Explorer Active Map)](http://monsterbookshop.co.uk/cdn/shop/files/9780319471562_678e8856-6a9d-4a50-b1a1-d588321bd7d5.jpg?v=1719186541&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.