My response re the Taj Mahal was reasonably serious....
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and at least ONE continent away from the place in question[bigrolf]
The things with the big auger is a piling machine. Round piles are generally used around the perimeter as there shape works easier with the top cap and also to become the walls of basement they will excavate. The square piles will be inside the structure. As Ian said, the piles can be angled to distribute load into the best substrate under the building - the building will have already been designed and its main column locations known - if theres stronger ground off to one side of that they will angle the piles into it. Big white thing on the left is a tower crane. Not sure what the red netting thingy is - could be a covered access stairway for the workers.
Edit - yes, red thing is an access stairway - if you zoom in you can just make out the zig zag of the stairways.
I spend at least one day a week trudgung around sites like this at work.
MY guess is one is adrill rig that also inerts the reo and then injects the concrete while the other is a tower concrete pump. Something big going up ? By the looks of things a few tower cranes too .
Thanks Gav[smilebigeye]
its the (top cut off) skinney thing on the right,,
looks like a half finished one far left,
there are two long arms with normal looking concrete pumping arms, on each side, standing straight up, on top of the them..
I tried to just drag the pic off my desktop into the post,, and it showed everything,, untill I hit enter and windows crashed--[bigrolf]