Set in a valley in Wanaka, New Zealand, the home of winemaker Nigel Greening was conceived as a series of "tubes" that disappear at one end into the sloped landscape. Architect Andrew Simpson of WireDog Architecture worked with Dunlop Builders to create the 3,390-square-foot house, which features rammed-earth walls both inside and out, a reflection of the owner’s connection to the soil.