England's last great wilderness is the 405 sq miles of natural wonderland that make up the country's least populated national park. The finest sections of Hadrian's Wall run along its southern edge and the landscape is dotted with prehistoric remains and fortified houses – the thick-walled peles were the only solid buildings built here until the mid-18th century.
Adjacent to the national park, the Kielder Water & Forest Park is home to the vast artificial lake Kielder Water, holding 200,000 million litres. Surrounding its 27-mile-long shoreline is England's largest plantation forest, with 150 million spruce and pine trees.
The lack of population helped see the area awarded dark-sky status by the International Dark Skies Association in 2013 (the largest such designation in Europe), with controls to prevent light pollution.