Three years ago, Chicago-based writer-producer Dan Protess and host-architecture buff Geoffrey Baer collaborated on a one-hour PBS program titled 10 Buildings That Changed America. This week, Protess and Baer broaden their scope with a three-part series, 10 That Changed America, which focuses on other key elements of the built environment.

The series premieres April 5 at 8 p.m. EDT on local PBS affiliates with 10 Homes That Changed America. This is followed a week later by the second episode, 10 Parks That Changed America. The series will conclude April 19 with 10 Towns That Changed America.