One evening very recently I literally strolled right in the front doors (ignoring the "Construction Personnel Only" signs) of the 'Rotower 3 office tower at about 8:30 p.m. Didn't see a security guard or another living soul anywhere, and poked around at my leisure, setting off numerous stairwell alarms, for about twenty minutes. Some nice views from the empty upper floors, some of which have balconies.

Elevator control room on the roof. Door was hanging open. Place looked eerily occupied.