- Anywhere. Everywhere.
Most cities, like my adopted home of Chicago, invest in some kind of tax-funded forest preserves, wetlands, or other natural public spaces. This means that you, an average tax-paying citizen, own a chunk of nature within reasonable distance of where you are right now. Run, don't walk, to that nearest space and keep on running without fear of traffic. Take ownership of what's rightfully yours, protect it from commercial interests, allow your kids to get a little dirt under their toes, and allow your inner kid to get a little dirty too.