Suspended more than 120 metres (400 feet) above a gaping chasm, the world’s longest cantilevered glass skywalk is delighting and terrifying visitors in China. The v-shaped walkway stretches almost 70 metres from a sheer cliff face in southwest Chongqing, offering intrepid tourists a vertigo-inducing view of the ground some 123 metres below. No more than 30 people are allowed on the skywalk at any one time. While some pause to pose for photos, others find it all a little too much to cope with, and grip the handrail with both hands as they inch along the walkway.