When planners of Minnesota’s largest economic development project unveil a final draft this afternoon of the city’s massive expansion project, they will present a new vision for downtown city life.

The $6 billion Destination Medical Center aims to make Rochester a global health care hub. But it also would make big changes to the city, among them:

• Remaking the area in front of Mayo Clinic’s 20-floor Gonda building into an ice skating rink, replacing a quiet pedestrian walkway.