#thespacesforsale: An eco-friendly, modular retreat centred around a James Turrell ‘Skyspace’. Designed by Marmol Radziner, the Arrowhead is a conglomeration of clean lines and cubes, featuring slatted walls, black seams, steel, glass and concrete, and intense blasts of colour. It also has views out over the flashing lights and brash antics of the Las Vegas strip. The Ridges, Las Vegas, USA; 5 bedrooms; 10,743 sq ft; $14.5m. Via @crosbydoe. See more at TheSpaces.com.