On the far west side of Manhattan, Thomas Heatherwick’s 2,500-step sculpture opens at Hudson Yards.

With the help of Snøhetta and Heatherwick Studio, a new plan by a joint partnership between Waterfront Toronto and Sidewalk Labs incorporates mass timber construction.

The skeletal tower, assembled ahead of schedule, is estimated to open in early 2019.

A new museum of contemporary African art heightens the sculptural power of the 1920s industrial complex in which it is housed.