The world's most famous car-free walk? New Zealanders proudly proclaim the Tongariro Alpine Crossing as the worlds best one-day walk. It's a challenging 18.5km hike across dramatic volcanic landscape in the heart of New Zealands North Island, where dark red craters with smoking fumaroles rise up amidst ancient lava flows

Every weekend in the summer, people swarm to the Lake District's myriad attractions.The campsites book up months in advance, spilling over with families, barbeques and guy ropes; crossing the field to join a toilet queue becomes an SAS-style mission.