What look like craters on the Moon are actually north-central Florida sinkholes. Sinkholes are depressions created in eroded limestone (karst) bedrock. As water dissolves the rock beneath the surface, it collapses, often over large areas. Melrose, east of Gainesville, is in the middle-left of the image.
The Maps-Un-Natural™ series could also be called Psychedelic Maps. These are an effort to create a visually stunning and interesting image, usually with a limited color palette. The coloration varies only with elevation and often brings out notable landscape features.
These posters are available on high-quality media (various papers and canvas) using archival inks, and print clearly up to about 34” x 23” (“Large” size). Fulfilled by Zazzle.com. There is a framing option on their website.