Abstract: A device comprising a spiral building having greenhouse enclosures mounted thereon. The greenhouse enclosures include an interior growing area and at least one slanted glass surface having a reflective surface. The at least one slanted glass surface is disposed over a growing tray which is orientated towards perpendicular rays of the sun, when the sun is at an equinox. The reflective surface of the at least one slanted glass surface is reversed from its normal orientation such that the reflective surface is disposed on an inside of the at least one slanted glass surface, thus reflecting light admitted through the at least one slanted glass surface and directing the light to parts of the interior growing area.