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8. Chicago, IL

Population: 7.9 million
% commute by walking: 3.2%
% commute by mass transit: 12.8%
Average commute: 33.7 minutes
Number of parks: 160

“Chicago is a sort of an East Coast city with a West Coast feel,” Sperling said. The Chicago metro area has density, with “wonderful neighborhoods and a great mass transit system,” he said, which is evident by the fact that nearly 13% of the population gets to work by mass transit. Plus, the city is putting in new parks and plazas to encourage even more walking. The city has 492 miles of former railroad lines that have been converted to footpaths, known as "rails to trails," and 160 parks, the second highest on the list.

John Johnston | Flickr