One of the earliest strange but beautiful object which I saw in Google Earth was the roof of Water Reservoir at Mina near holy city of Makkah, Saudi Arabia.
View in Google Maps Google Earth
The water reservoir caters to about 2 millions pilgrims who gather every year at Mina, during Hajj and it is covered by this huge cable-stayed reinforced concrete shell roof which has a diameter of 365 metres. The cover is supported by 88 concrete towers, each 60 metres in height. A network of thick pre stressed cables holds the concrete beams over which the roof is laid out. It is one the largest cable-stayed concrete shell roofs in the world.
As per selimrg whose photo of the actual view has been shown above;
"The concept is based on the inherent stiffness of a ring of 'A' frames from which radial in-situ beams, cast using rotating formwork, are stayed with over 214m clear span. The roof is composed of precast concrete barrel vault shells, acting integrally with the beams to form a strong and efficient structure. The enclosed volume beneath the roof is 1.7 million cubic meter with a surface area almost 90,000 sqm and a perimeter of over a kilometer is greater than the London Millennium Dome."
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