We asked Scientific American readers, as part of our special issue on cities coverage this month, to send us pictures they took of a science or engineering infrastructure scene outside their windows that illustrated the best or worst aspect of life in their city.

This offering came from Evan Judd: a view from his lab in the Life Sciences and Engineering Building at Boston University. The shot features Interstate 90, which shuttles thousands of cars into and out of Boston daily, evidence of public transportation via commuter rail tracks, residential and commercial city blocks, and a stretch of green that is part of the city's "Emerald Necklace" of parks. "This particular part of the Emerald Necklace is a relaxing escape from the hustle and bustle of the city around you," Judd says. "It's easy to forget you are even in Boston—until a D Line trolley whizzes past on tracks that border the park." The upper corner of the image shows some large buildings that make up the Longwood Medical Area. Judd took this photograph on August 10, 2011.

Want to join in? Please send your photograph, a description of how it illustrates the best or worst aspect of life in your city and the date it was taken to submit@sciam.com.