The complex is a patchwork of various connected buildings added over the years, filled with a warren of hallways and quirky features such as the World of Rubber museum, conveyor belt-like "speed ramps" that were Goodyear-made hybrids of escalators and moving walkways, and a room filled with models of Goodyear plants.

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In fact, this bicycle doesn't use any metal parts at all -- the solid tires are made of reconstituted rubber and a car timing belt is used instead of a chain.

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On the bottom are three rubber feet that keep the ACU firmly in place on a table and a belt clip (a humorous addition given its large size).

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His only equipment, apart from rubber-soled boots, was a bag of chalk slung at the back of his belt, into which he dipped his hands to dry the sweat and improve his grip.

ECONOMIST: John Bachar, free-climber, died on July 5th, aged 52