Frank McKinney, known as the real estate "artist," has built a 15,000-square-foot "eco-mansion." Is that possible? I am not sure whether to look in awe at all the sleek green that money can buy, or to recoil from the notion that 15,000 feet of excess is environmentally friendly. Inspired by trips to Bali, Fiji, Tahiti and Hawaii, the three-story, 15,000-square-foot, 7-bedroom, 11-bath mansion features floating sun terraces, a waterfall spa with a fire feature in the water and an arched aquarium wet bar. Green features inside the one-off mansion include enough solar panels to cover a basketball court generating enough energy for two or three average-size homes. A water system that collects enough run-off water to fill the average swimming pool every 14 days and environmentally conscious lighting reduces electricity consumption by 70 per cent. There is enough reclaimed wood to save 10.5 acres of Brazilian rain forest.

But, still, do the words "green" and "mansion" go together?