Since the '70s, Orange County has witnessed a tremendous amount of growth. The City Beautiful, or "Action Center USA," is reportedly the most visited state destination in the United States. In 2014 alone, 64 million people visited Orlando. You certainly don't need satellite images to see how tourism has made its impact on Orange County. However, it does help.

As part of NASA's World of Change series, these images of Orlando come from the Landsat series of satellites between 1972 and 2014. If you're wondering why water is black, vegetation is red, and urban areas are brown to gray, it's because the images are shown in red, green and near-infrared light, a combination that NASA says helps differentiate components of landscapes.

Also, the picture quality is lower in the earlier frames because the Landsat imaging instruments weren't that great in the early '70s.

All photos via NASA.org