Quiet Zone: 702

Sunlight peaks through trees as a car winds down a mountain road in Highland County, Va., inside the National Radio Quiet Zone. At 13,000 square-miles in size, the quiet zone is larger than the state of Maryland.

Sunlight peaks through trees as a car winds down a mountain road in Highland County, Va., inside the National Radio Quiet Zone. At 13,000 square-miles in size, the quiet zone is larger than the state of Maryland.