The McCormick Place Event Center under construction.

It’s surely a combination of blue steel and red crane, but the construction process at the McCormick Place Event Center in the Prairie District of the South Loop is as much fun to watch as any building site in Chicago. And with the rooftop garden at McCormick Place accessible for Open House Chicago this weekend, you can climb up there and take in the view for yourself. (Make a point to check out the vegetables and herbs as well, just to have a memory of being in a garden on a roof, but you’ll be swept in by the construction.)

Quickly, before you’re deluged by a huge gallery of photos: The McCormick Place Event Center will be a 10,000-seat arena designed by Pelli Clarke Pelli serving as the home court for DePaul basketball, as well as a host to concerts, conventions, business meetings, and other sporting events. Clark Construction is the general contractor.