Miami's first 'supertall' skyscraper is nearing completion. More are coming

The 100-story Waldorf Astoria, resembling a stack of cubes, rises above the Miami skyline in this artist rendering. The building is scheduled for completion next year. (Courtesy / Waldorf Astoria )Commuters passing from Miami Beach to the mainland on the MacArthur Causeway have in recent months seen a soon-to-be iconic building on the Miami skyline start to take shape: the Waldorf Astoria Hotel Residences. The building, designed by Uruguayan-Canadian architect Carlos Ott and the architectural firm Sieger Suarez, is composed of nine cubes stacked on top of one another unevenly, giving the distinct impression that the entire 100-story structure could topple over. Standing at the base of the building, it's hard not to think about the force of gravity and wonder what keeps it upright. " There are some things that were like optical illusions, like our core goes straight up, our elevator goes straight up. It may not look like that, but it does," Ryan Shear,  the managing partner for PMG,