Road safety officer Sue Virgin, from Dorchester in Dorset, told BBC News today's teenagers still needed to be taught how to cross the road.

BBC: Road safety drive for teenagers

Its six villages are cut off from the rest of the country, except for a single mountain road that runs through a broad belt of virgin forest that forms part of the Swiss National Park.

BBC: The perfect trip: Switzerland

Milford is the most accessible, with a paved road and visitor centre, but Fjordlands National Park comprises three million acres of fjords and virgin rainforest, much of which has seldom been witnessed by man.

BBC: The perfect trip: New Zealand