A 300ft spiral staircase has been installed on the wall of the Taihang Mountains in China. However, for health and safety reasons, the stairs do not offer admission to just anyone. ‘Here the wind blows and batters them, the birds fly past them, the stairs creak. It is a lot more authentic than an elevator,’ explained one official. All potential climbers have to sign a form stating that they have no heart or lung problems and are under 60 years of age. one helluva climb even by staircase!!!