Our tipsters sidestep big cities and theme parks to explore a bridge leading nowhere, great galleries, steaming volcanoes and outposts of US history
The jewel of Kinzua Bridge state park is the Kinzua Viaduct (once the US’s highest railway bridge). In 2003 it was hit by a tornado, which ripped away a large section. The Pennsylvania government decided that what remained of the bridge should be left as an example of the forces of nature. So it built an amazing visitor centre and sky walk where you can walk to a glass-floored observation deck at the edge of the viaduct’s remains for amazing aerial views of the state park, the valley and the creek. A hundred metres below your feet you’ll see the mangled remnants of the structure currently holding you up.