View Slideshow Sotheby’s is an iconic name in auctions, a decades-old seller of fine goods. Some of the world’s most expensive jewels and rarest works of art have been sold here. Now, Sotheby’s has put an entire island for sale. It’s carbon neutral and already has some incredible buildings standing on it. Continue reading below Our Featured Videos C This island is an incredible example of how nature can be harnessed but not destroyed. The buildings on the island are made with both natural and manmade materials. A combination of hempcrete , 3D-printed concrete and seaweed were used to create the buildings. Related: A floating park above the piers of Manhattan, New York The island is off the mainland of Nova Scotia, Canada, about 50 miles from Halifax. Buildings on the island include the Earth House, which is really nine interconnected buildings. The Wood House is also here, a garden suite near the eastern shore.…