The Solar City Tower would be tall enough to be seen poking through the clouds on the main aircraft approach into the city. Located on a small island, the sustainable landmark would consist of a solar power plant that by day produced energy for the Olympic village and the waterfall.

Extra power would be used to pump and store water for storage, which would be then released at night to produce a nocturnal supply of electricity. Designed by Swiss architects RAFAA, The Solar City Tower would feature an observation tower, cafe and shops at its summit. The concept was created for a design competition for an Olympic landmark for Rio de Janeiro.

And here's me thinking Charlie Dimmock was the expert on water features!

The idea came to the architect seemingly out of nowhere...

The original was here