Have you ever heard about an unique Hajj Terminal at Saudi

Every year hundreds of thousands of Muslims converge on Mecca to perform the Hajj, the pilgrimage that is a duty of their faith. Designed to host this influx, the Hajj Terminal at Saudi Arabia's King Abdulaziz International Airport is a strikingly modern, open air tent village covering 120 acres. 

Most buildings hold their structure up by the weight of things pushed together stacked bricks and joists,for example.But the Hajj terminal relies instead on tension ,the force created when things are pulled apart.In the roofs of Hajj terminal vast swathes of light weight ,flexible,Teflon coated fiber glass fabric are suspended in cone shape on taut steel cables