Aside from airports, government buildings and other high-security areas, you can never be sure when you’re under surveillance. You can look up and sometimes spot the cameras, but they’re not always in plain sight. The level of government surveillance depends on where you live. The top 10 cities with the most cameras relative to population are Atlanta, GA, Philadelphia, PA, Denver, CO, Washington, DC, San Francisco, CA, Las Vegas, NV, Detroit, MI, Chicago, IL, Portland, OR, and Fresno, CA.