The landscape beneath them is very similar, with flower-covered hills and mountains in the background. It was also mentioned on the page for the Cloud Arena that "...It shares many architectural similarities with the Ancient Sky Arena." Pearl also states that "This is an Ancient Sky Arena... where some of the first battles for Earth took place." In The Answer, it is revealed that there was at least one battle on the Cloud Arena. What do you guys think?
Not really. While the location of the Gem Ship matches Southeastern Colombia (the "rainforest" enviroment clearly depicting that), the marking precisely points to Central Brazil. The climate seen at The Answer matches the region perfectly.