Top 10 Nonexistent Islands That Appeared On Maps There are certain islands that have been “discovered” and added to maps before being found to be nonexistent. Yet, their discoverers often claim to have sighted them, and some even said they landed on them. Expeditions sent to the supposed locations of these islands often ended up finding the open ocean and nothing else, although some claimed to have found the islands. We have complied ten such islands. This list does not contain islands deliberately added to maps to catch plagiarists, similar to trap streets. [1] All the islands were actually reported to have been spotted, though some were made up. However, they all appeared on maps.