Because it's "National Walk at Lunch Day."
Workers at Independence Blue Cross in center city celebrated by walking, of course, and also encouraging and helping other workers to find good walking routes downtown.
Some of the benefits of walking include:
* Improved overall health, which can lower your risk for disease
* It helps relieve stress
* It boosts energy, which makes you more productive
* And it puts you in a better mood
The day is organized by Blue Cross and Blue Shield organizations all over the country.
For more information, click here.