The tower crane that isn’t a tower crane at 151 North Franklin still soars high above Randolph Street.

I missed the memo that said 151 North Franklin would be growing like a weed in spring, despite Chicago heading into winter. On the lot that only yesterday still seemed to anchor that worn-out old Walgreen’s store, the future CNA Center already appears to be about 18 stories into the sky. You can credit Lendlease for that miracle growth, for even in Thursday’s inhuman temperatures, there was still a construction crew on site. That’s not just a core shooting up through the center of The John Buck Company’s 820,000-square-foot office tower, that’s hard-core.

Here are a few shots on 151 North Franklin, which has outgrown all the adjacent parking garages, and their prime vantage points.