4. Cayan Tower, Dubai, UAE This building's twisted shape reduces wind forces on the tower. Each floor is rotated by 1.2 degrees to achieve the full 90-degree spiral, creating the shape of a helix. Used mainly as residential property, it is the world's tallest tower featuring a 90-degree twist.

第四名：阿聯(lián)酋迪拜卡延塔。此建筑的螺旋設計減小風的阻力。每層旋轉1.2度，最終達到90度的螺旋。主要是住宅地產(chǎn)，它是世界最高樓，以其90度螺旋而著名。