Capital Gate, Most leaning building in the world

Capital Gate, the iconic leaning building in Abu Dhabi, reached halfway point. The building, designed by international architects RMJM, will lean 18 degrees westward, 14 degrees more than the Leaning Tower of Pisa.
To make this possible, the central core of the building slants in the opposite direction to the lean of the structure, and it straightening as it grows. It sits on top of a 7-foot-deep concrete base with a dense mesh of reinforced steel. The steel exoskeleton known as the diagrid sits above an extensive distribution of 490 piles that have been drilled 100 feet underground to accommodate the gravitational, wind and seismic pressures caused by the lean of the building.(via)